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Selina solutions for Concise Mathematics Class 10 ICSE chapter 9 - Matrices [Latest edition]

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Chapters

Concise Mathematics Class 10 ICSE - Shaalaa.com

Chapter 9: Matrices

Exercise 9(A)Exercise 9(B)Exercise 9(C)Exercise 9(D)

Exercise 9(A) [Page 120]

Selina solutions for Concise Mathematics Class 10 ICSE Chapter 9 Matrices Exercise 9(A) [Page 120]

Exercise 9(A) | Q 1.1 | Page 120

State, whether the following statement is true or false. If false, give a reason.

If A and B are two matrices of orders 3 × 2 and 2 × 3 respectively; then their sum A + B is possible.

  • True

  • False

Exercise 9(A) | Q 1.2 | Page 120

State, whether the following statements are true or false. If false, give a reason.

The matrices A2 × 3 and B2 × 3 are conformable for subtraction.

  • True

  • False

Exercise 9(A) | Q 1.3 | Page 120

State, whether the following statement is true or false. If false, give a reason.

Transpose of a 2 × 1 matrix is a 2 × 1 matrix.

  • True

  • False

Exercise 9(A) | Q 1.4 | Page 120

State, whether the following statements are true or false. If false, give a reason.

Transpose of a square matrix is a square matrix.

  • True

  • False

Exercise 9(A) | Q 1.5 | Page 120

State, whether the following statements are true or false. If false, give a reason.

A column matrix has many columns and one row.

  • True

  • False

Exercise 9(A) | Q 2 | Page 120

Given `[(x, y + 2),(3, z - 1)] = [(3,1),(3,2)]`, Find x, y, z

Exercise 9(A) | Q 3.1 | Page 120

Solve for a, b and c if `[(-4, a + 5),(3, 2)] = [(b + 4, 2),(3, c- 1)]`

Exercise 9(A) | Q 3.2 | Page 120

Solve for a, b and c if `[(a, a- b),(b + c, 0)] = [(3, -1),(2,0)]`

Exercise 9(A) | Q 4.1 | Page 120

If A = [8  -3] and B = [4  -5]; find A + B

Exercise 9(A) | Q 4.2 | Page 120

If A = [8  -3] and B = [4  -5]; find B - A

Exercise 9(A) | Q 5.1 | Page 120

If `A = [2/5]`,` B = [1/4]` and `C = [6/-2]` Find B + C

Exercise 9(A) | Q 5.2 | Page 120

If A = `[2/5], B = [1/ 4] and c = [6/-2] `Find A - C

Exercise 9(A) | Q 5.3 | Page 120

if `A = [(2),(5)], B = [(1),(4)] and C = [(6),(-2)]` Find A + B - C

Exercise 9(A) | Q 5.4 | Page 120

If A = `[2/5], B = [1/4] and C =[6/-2], `find :

A – B +C

Exercise 9(A) | Q 6.1 | Page 120

Wherever possible write of the following as a single matrix

`[(1, 2),(3, 4)] +[(-1,-2), (1,-7)]`

Exercise 9(A) | Q 6.2 | Page 120

Wherever possible write of the following as a single matrix

`[(2,3,4),(5,6,7)] - [(0,2,3),(6,-1,0)]`

Exercise 9(A) | Q 6.3 | Page 120

Wherever possible write of the following as a single matrix

`[(0,1,2),(4,6,7)] + [(3,4),(6,8)]`

Exercise 9(A) | Q 7.1 | Page 120

Find x and y from the given equations:

`[(5,2),(-1, y - 1)] - [(1, x -1),(2, -3)] = [(4,7),(-3,2)]`

Exercise 9(A) | Q 7.2 | Page 120

Find x and y from the given equations:

[-8 x] + [y -2] = [-3 2]

Exercise 9(A) | Q 8.1 | Page 120

Given M = `[(5, -3),(-2, 4)]` Find its transpose matrix `M^t`. If possible find `M + M^t`

Exercise 9(A) | Q 8.2 | Page 120

Given `M = [(5, -3),(-2, 4)]` find its transpose matrix `M^t` if possible find `M^t - M`

Exercise 9(A) | Q 9 | Page 120

Write the additive inverse of matrices A, B and C Where A = [6, -5]; B = `[(-2, 0),(4, -1)] and C = [(-7), (4)]`

Exercise 9(A) | Q 10.1 | Page 120

Given A = [2 -3], B = [0 2] and C = [-1  4]; Find the matrix X in the following:

X + B = C - A

Exercise 9(A) | Q 10.2 | Page 120

Given A = [2  -3],  B = [0  2] and C = [-1  4]; Find the matrx X in the following

A - X = B + C

Exercise 9(A) | Q 11.1 | Page 120

Given `A = [(-1, 0),(2, -4)] and B = [(3, -3),(-2, 0)]` Find the matrix X in the following 

A + X = B

Exercise 9(A) | Q 11.2 | Page 120

Given A` = [(-1, 0),(2,0)]` and B = `[(3, -3),(-2, 0)]` find the matrix X in of the following 

A- X = B

Exercise 9(A) | Q 11.3 | Page 120

Given `A = [(-1, 0),(2, -4)]` and `B = [(3, -3),(-2, 0)]` Find the matrix X in following

X - B = A

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Exercise 9(B) [Pages 121 - 122]

Selina solutions for Concise Mathematics Class 10 ICSE Chapter 9 Matrices Exercise 9(B) [Pages 121 - 122]

Exercise 9(B) | Q 1.1 | Page 121

Evaluate 3[5  -2]

Exercise 9(B) | Q 1.2 | Page 121

Evaluate `7[(-1, 2),(0, 1)]`

Exercise 9(B) | Q 1.3 | Page 121

Evaluate :     `2[(-1      0)/(2 -3)]  +[(3      3)/(5    0)]`

Exercise 9(B) | Q 1.4 | Page 121

Evaluate `6[(3), (-2)] -2[(-8), (1)]`

Exercise 9(B) | Q 2.1 | Page 121

Find x and y if 3[4  x] + 2[y  -3] = [10   0]

Exercise 9(B) | Q 2.2 | Page 121

Find x and y if `x[(-1), (2)] - 4[(-2), (y)] = [(7),(-8)]`

Exercise 9(B) | Q 3.1 | Page 121

Given `A = 2[(2, 1),(3, 0)],-3[(1, 1),(5, 2)] + [(-3, -1),(0,0)]` Find 2A - 3B + C

Exercise 9(B) | Q 3.2 | Page 121

Given A =  `2[(2,1),(3,0)]-3[(1,1),(5,2)]+[(-3, -1),(0,0)]`: find  A + 2C – B

Exercise 9(B) | Q 4 | Page 121

If `[(4, -2),(4, 0)] + 3A = [(-2,-2),(1, -3)]` Find A

Exercise 9(B) | Q 5.1 | Page 121

Given `A = [(1, 4),(2, 3)] and B = |(-4-1),(-3 -2)|`

Find the matrix 2A  + B

Exercise 9(B) | Q 5.2 | Page 121

Given `A = [(1   4),(2  3)] and B = [(-4 -1),(-3 -2)]` Find the matrix C such that C + B = `[(0, 0),(0,0)]`

Exercise 9(B) | Q 6 | Page 122

If `2[(3, x),(0, 1)] + 3[(1, 3),(y, 2)] = [(z, -7),(15, 8)]` Find the values of x, y and z.

Exercise 9(B) | Q 7.1 | Page 122

Given `A = [(-3, 6),(0, -9)]` and `A^t` its transpose matrix. Find `2A + 3A^t`

Exercise 9(B) | Q 7.2 | Page 122

Given `A = [(-3, 6),(0, -9)]` and `A^t` is its transpose matrix Find `2A^t - 3A`

Exercise 9(B) | Q 7.3 | Page 122

Given `A = [(-3, 6),(0, -9)]` and `A^t` is its transpose matrix. Find `1/2 A - 1/3 A^t`

Exercise 9(B) | Q 7.4 | Page 122

Given `A = [(-3, 6),(0, -9)]` and `A^t` is its transpose matrix Find `A^t - 1/3 A`

Exercise 9(B) | Q 8.1 | Page 122

Given `A = [(1, 1),(-2, 0)]` and `B = [(2, -1),(1, 1)]`

Solve for matrix X:

X + 2A = B

Exercise 9(B) | Q 8.2 | Page 122

Given `A = [(1,1),(-2, 0)]` and `B = [(2, -1), (1, 1)]` Solve for matrix X

3X + B + 2A = O

Exercise 9(B) | Q 8.3 | Page 122

Given A = `[(1,1),(-2, 0)]` and `B = [(2, -1),(1, 1)]` Solve for matrix X:

3A - 2X = X - 2B

Exercise 9(B) | Q 9 | Page 122

If `M =  [(0), (1)]` and `N = [(1),(0)]` show that `3M + 5N = [5/3]`

Exercise 9(B) | Q 10.1 | Page 122

If I is the unit matrix of order 2 x 2 Find the matrix M such that `M - 2I = 3[(-1, 0),(4, 1)]`

Exercise 9(B) | Q 10.2 | Page 122

If I is the unit matrix of order 2 x 2. Find the matrix M such that 

`5M + 3I  = 4[(2, -5),(0, -3)]`

Exercise 9(B) | Q 11 | Page 122

If `[(1, 4),(-2, 3)] + 2M = 3[(3, 2),(0, -3)]`, find the matrix M 

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Exercise 9(C) [Pages 129 - 131]

Selina solutions for Concise Mathematics Class 10 ICSE Chapter 9 Matrices Exercise 9(C) [Pages 129 - 131]

Exercise 9(C) | Q 1.1 | Page 129

Evaluate if possible `[(3 ,2)][(2),(0)]`

Exercise 9(C) | Q 1.2 | Page 129

Evaluate if possible `[(1, -2)][(-2, 3),(-1, 4)]`

Exercise 9(C) | Q 1.3 | Page 129

Evaluate if possible `[(6, 4),(3, -1)][(-1),(3)]`

Exercise 9(C) | Q 1.4 | Page 129

Evaluate if possible `[(6, 4),(3, 1)][-1, 3]`

Exercise 9(C) | Q 2.1 | Page 129

If `A = [(0, 2),(5, -2)]`, `B= [(1, -1),(3, 2)]` and I is a unit matrix of order 2 x 2 find AB

Exercise 9(C) | Q 2.2 | Page 129

If `A = [(0, 2),(5, -2)], B = [(1, -1),(3, 2)]` and I is a unit matrix of order 2 x 2 findb BA

Exercise 9(C) | Q 2.3 | Page 129

If `A = [(0, 2),(5, -2)]`, B =` [(1, -1),(3, 2)]` and I is a unit matrix of order 2 x 2. Find AI

Exercise 9(C) | Q 2.4 | Page 129

If `A= [(0, 2),(5, -2)], B = [(1, -1),(3, 2)]` and I is unit matrix of order 2 x 2 Find IB

Exercise 9(C) | Q 2.5 | Page 129

If `A = [(0, 2),(5, -2)], B = [(1, -1),(3, 2)]` and I is a unit matrix of order 2 x 2 find `A^2`

Exercise 9(C) | Q 2.6 | Page 129

If `A = [(0, 2),(5, -2)], B = [(1, -1),(3, 2)]` and I is unit matrix of order 2 x 2 find `B^2A`

Exercise 9(C) | Q 3 | Page 129

If A = `[(3,x), (0,1)]` and B = `[(9,16), (0,-y)]`, find x and y when A2 = B

Exercise 9(C) | Q 4.1 | Page 129

Find x and y if `[(4, 3x),(x, -2)][(5), (1)] = [(y),(8)]`

Exercise 9(C) | Q 4.2 | Page 129

Find x and y if `[(x, 0),(-3, 1)][(1,1),(0, y)] = [(2,2),(-3, -2)]`

Exercise 9(C) | Q 5 | Page 129

If `A = [(1, 3),(2, 4)], B = [(1, 2),(4, 3)] and C = [(4, 3),(1, 2)]` find 

1) (AB)C

2) A(BC)

Is A(BC) = (AB)C?

Exercise 9(C) | Q 6.1 | Page 129

Given `A = [(0, 4, 6),(3, 0, -1)]` and B = `[(0, 1),(-1, 2),(-5, -6)]` find if possible AB

Exercise 9(C) | Q 6.2 | Page 129

Given `A = [(0, 4, 6),(3, 0, -1)]` and `B = [(0, 1),(-1, 2),(-5, -6)]`  find if possible BA

Exercise 9(C) | Q 6.3 | Page 129

Given `A = [(0, 4, 6),(3, 0, 1)][(0, 1),(-1, 2),(-5, -6)]` Find if possible `A^2`

Exercise 9(C) | Q 7 | Page 129

Let A = `[(2,1), (0,-2)], B = [(4,1), (-3,-2)] and C = [(-3,2), (-1,4)]` FindA2 + AC -5B

Exercise 9(C) | Q 8 | Page 129

If `M =[(1, 2),(2, 1)]` and I is a unit matrix of the same order as that of M Show that `M^2 = 2M + 3I`

Exercise 9(C) | Q 9 | Page 129

If `A = [(a, 0),(0, 2)]`, B = `[(0, -b),(1, 0)], M = [(1, -1),(1, 1)]` and `BA = M^2` find the values of a and b.

Exercise 9(C) | Q 10.1 | Page 129

Given `A = [(4, 1),(2,3)]` and `B = [(1, 0),(-2, 1)]` Find A - B

Exercise 9(C) | Q 10.2 | Page 129

Given `A = [(4, 1), (2, 3)]` and `B = [(1, 0),(-2, 1)]` Find `A^2`

Exercise 9(C) | Q 10.3 | Page 129

Given `A = [(4, 1),(2, 3)]` and `B = [(1, 0),(-2, 1)]` Find AB

Exercise 9(C) | Q 10.4 | Page 129

Given `A = [(4, 1),(2, 3)]` and `B = [(1, 0),(-2, 1)]` Find `A^2 - AB + 2B`

Exercise 9(C) | Q 11.1 | Page 129

If `A  = [(1, 4), (1, -3)]` and `B = [(1, 2),(-1, -1)]` Find `(A + B)^2`

Exercise 9(C) | Q 11.2 | Page 129

If `A = [(1, 4),(1, -3)]` and `B = [(1, 2),(-1, -1)]` Find `A^2 + B^2`

Exercise 9(C) | Q 11.3 | Page 129

If A= [(1, 4), (1, -3)] and `B = [(1, 2),(-1, -1)]` Find :  Is `(A + B)^2 = A^2 + B^2?`

Exercise 9(C) | Q 12 | Page 130

Find the matrix A, If B =`[(2,1),(0,1)] and B^2 = B+1/2A`

Exercise 9(C) | Q 13 | Page 130

If `A = [(-1, 1),(a, b)]` and `A^2 = I`; Find a and b

Exercise 9(C) | Q 14.1 | Page 130

If `A = [(2, 1),(0, 0)] , B = [(2, 3),(4, 1)] and C = [(1, 4),(0, 2)]` then show that A(B + C) = AB + AC

Exercise 9(C) | Q 14.2 | Page 130

If` A = [(2, 1),(0,0)], B = [(2, 3),(4, 1)] and C = [(1, 4),(0, 2)]` then show that (B - A)C = BC - AC

Exercise 9(C) | Q 15 | Page 130

If `A = [(1, 4),(2, 1)], B = [(-3, 2),(4, 0)]] and C = [(1, 0),(0, 2)]` Simplify `A^2 + BC`

Exercise 9(C) | Q 16.1 | Page 130

Solve for x and y: `[(2, 5),(5, 2)][(x),(y)] = [(-7),(14)]`

Exercise 9(C) | Q 16.2 | Page 130

Solve for x and y :

`[x+y   x-4] [(-1,-2),(2,2)] = [-7  -11]`

Exercise 9(C) | Q 16.3 | Page 130

Solve for x and y `[(-2,0), (3,1)][(-1), (2x)] +3[(-2), (1)] =2[(y), (3)]`

Exercise 9(C) | Q 17.1 | Page 130

In the given case below find

a) The order of matrix M.

b) The matrix M

`M xx [(1,1),(0, 2)] = [1, 2]`

Exercise 9(C) | Q 17.2 | Page 130

In the given case below, Find :

a) The order of matrix M

b) The matrix M

`[(1, 4),(2, 1)] xx M = [(13), (5)]`

Exercise 9(C) | Q 18 | Page 130

If `A = [(2, x),(0, 1)] and B = [(4, 36),(0, 1)]`. Find the vlaue of x given that `A^2 = B`

Exercise 9(C) | Q 19 | Page 130

If A = `[(3,7), (2,4)], B = [(0,2), (5,3)] and C = [(1,-5), (-4,6)]` Find AB - 5C

Exercise 9(C) | Q 20 | Page 130

If A and B are any two 2 x 2 matrices such that AB = BA = B and B is not a zero matrix, what can you say about the matrix A?

Exercise 9(C) | Q 21 | Page 130

Given `A = [(3, 0),(0, 4)]`, `B = [(a, b),(0, c)]` and that AB = A + B. Find the values of a, b and c

Exercise 9(C) | Q 22 | Page 130

If `P = [(1, 2),(2, -1)] and Q = [(1, 0),(2, 1)]` then compute:

1) `P^2 - Q^2`

2) (P + Q)(P - Q)

`Is (P + Q)(P - Q) = P^2 - Q^2` true for matrix algebra?

Exercise 9(C) | Q 23 | Page 130

Given the matrices `A = [(2, 1),(4, 2)], B = [(3, 4),(-1, -2)] and C = [(-3, 1),(0, -2)]` Find 

1) ABC

2) ACB

State whether ABC = ACB.

Exercise 9(C) | Q 24.1 | Page 130

If `A = [(1, 2),(3, 4)]`, `B = [(6, 1), (1, 1)]` and `C= [(-2, -3),(0, 1)]` Find the following and state of they are equal CA + B

Exercise 9(C) | Q 24.2 | Page 130

If `A = [(1, 2),(3, 4)], B = [(6, 1), (1, 1)] and C = [(-2, -3),(0, 1)]` find of the following and state if they are equal A + CB

Exercise 9(C) | Q 25 | Page 130

if `A = [(2, 1),(1, 3)]` and `B = [(3),(-11)]` Fidn the matrix X such that AX = B

Exercise 9(C) | Q 26 | Page 130

If `A =[(4, 2),(1,1)]` Find (A - 2I)(A - 3I)

Exercise 9(C) | Q 27.1 | Page 130

If `A = [(2, 1, -1),(0, 1, -2)]` Find `A^t. A` Where  `A^t.A` is the transpose of matrix A

Exercise 9(C) | Q 27.2 | Page 130

If `A = [(2,1,-1),(0, 1,-2)]` find `A.A^t` where `A^t` is the transpose of matrix A

Exercise 9(C) | Q 28 | Page 130

if M = `[(4,1),(-1,2)]` show that `6m - m^2 = 9I` where I is 2 x 2 unit matrix.

Exercise 9(C) | Q 29 | Page 130

If `P = [(2,6),(3,9)]` and `Q = [(3,x),(y, 2)]` find x and y such that PQ = null matrix

Exercise 9(C) | Q 30 | Page 130

Evaluate  without using tables:

`[(2 cos 60^@ - 2 sin 30^@),(-tan 45^@ , cos 0^@)][(cot 45^@,cosec 30^@),(sec 60^@,sin 90^@)]`

Exercise 9(C) | Q 31.1 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2

A + B = B + A

  • True

  • False

Exercise 9(C) | Q 31.2 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2.

A – B = B – A

  • True

  • False 

Exercise 9(C) | Q 31.3 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2.

(B. C). A = B. (C. A)

  • True

  • False

Exercise 9(C) | Q 31.4 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2.

 (A + B). C = A. C + B. C

  • True

  • False

Exercise 9(C) | Q 31.5 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2.

A. (B - C) = A. B - A. C

  • True

  • False

Exercise 9(C) | Q 31.6 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2.

(A – B). C = A. C – B. C

  • True

  • False

Exercise 9(C) | Q 31.7 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2.

A² – B² = (A + B) (A – B)

  • True

  • False

Exercise 9(C) | Q 31.8 | Page 131

State, with reason, whether the following are true or false. A, B and C are matrices of order 2 x 2.

(A – B)² = A² – 2A. B + B²

  • True

  • False

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Exercise 9(D) [Pages 131 - 132]

Selina solutions for Concise Mathematics Class 10 ICSE Chapter 9 Matrices Exercise 9(D) [Pages 131 - 132]

Exercise 9(D) | Q 1 | Page 131

Find x and y, if `((3,-2),(-1,4))((2x),(1)) + 2((-4),(5)) = 4((2),(y))`

Exercise 9(D) | Q 2 | Page 131

Find x and y if `[3x  8][(1,4),(3,7)] - 3[(2,-7)] = 5[(3, 2y)]`

Exercise 9(D) | Q 3.1 | Page 131

if `[x,y][(x),(y)]` = [25]  and `[-x, y][(2x),(y)] = [-2]` find x and y if `x, y  ε  W` (whole numbers)

Exercise 9(D) | Q 3.2 | Page 131

If `[x, y][(x),(y)] = [25]` and `[(-x, y)][(2x),(y)] = [-2]` find x and y if `x, y  ε  Z` (integer)

Exercise 9(D) | Q 4.1 | Page 131

Given `[(2, 1),(-3, 4)] X = [(7), (6)]` write the order of matrix x

Exercise 9(D) | Q 4.2 | Page 131

Given `[(2, 1),(-3, 4)] x = [(7),(6)]` Write the matrix x

Exercise 9(D) | Q 5 | Page 131

Evaluate `[(cos 45°, sin 30°),(sqrt2 cos 0°, sin 0°)][(sin 45°, cos 90°), (sin 90°, cot 45°)]`

Exercise 9(D) | Q 6 | Page 131

If `A = [(0, -1),(4, -3)]`, B = `[(-5),(6)]` and 3A x M = 2B; Find matrix M

Exercise 9(D) | Q 7 | Page 131

If `[(a, 3),(4, 1)] + [(2, b),(1, -2)] - [(1,1),(-2, c)] = [(5, 0),(7, 3)]`, Find the values of a, b and c

Exercise 9(D) | Q 8.1 | Page 131

If `A = [(1, 2),(2,1)]` and `B = [(2, 1),(1, 2)]` Find A(BA)

Exercise 9(D) | Q 8.2 | Page 131

If `A = [(1, 2),(2, 1)]` and `B= [(2,1),(1, 2)]` Find (AB).B

Exercise 9(D) | Q 9 | Page 131

Find x and y if `[(x, 3x),(y, 4y)][(2), (1)] = [(5),(12)]`

Exercise 9(D) | Q 10 | Page 131

If matrix `X = [(-3, 4),(2, -3)][(2),(-2)]` and 2X - 3Y = `[(10),(-8)]`; Find the matrix X and Y

Exercise 9(D) | Q 11 | Page 131

Given `A = [(2, -1),(2, 0)] B = [(-3, 2),(4, 0)]` and `C = [(1, 0),(0, 2)]` Find the matrix X such that A + X = 2B = C

Exercise 9(D) | Q 12 | Page 131

Find the value of x, given that `A^2 = B`

`A = [(2, 12),(0, 1)] and B = [(4, x),(0, 1)]`

Exercise 9(D) | Q 13 | Page 131

If `A = [(2, 5),(1, 3)]`, `B = [(4, -2),(-1, 3)]` and I is Identity matrix of same order and `A^t` is the transpose of matrix A find `A^t.B + BI`

Exercise 9(D) | Q 14 | Page 131

Given A = `[(2,-6),(2,0)], "B" = [(-3,2),(4,0)], "C" = [(4,0),(0,2)]` Find the matrix X such that A + 2X = 2B + C.

Exercise 9(D) | Q 15 | Page 131

Let `A = [(4, -2),(6, -3)], B = [(0, 2),(1, -1)] and C =[(-2, 3),(1, -1)]` Find `A^2 + A +BC`

Exercise 9(D) | Q 16 | Page 132

Let `A = [(1, 0),(2, 1)], B = [(2, 3),(-1, 0)]`. Find `A^2 + AB + B^2`

Exercise 9(D) | Q 17 | Page 132

If `A = [(3, a),(-4, 8)], B = [(c, 4),(-3, 0)], C = [(-1, 4),(3, b)]` and 3A - 2C = 6B, find the values of a, b , c.

Exercise 9(D) | Q 18 | Page 132

Given `A = [(p, 0),(0, 2)], B = [(0, -q),(1, 0)]  C = [(2, -2),(2, 2)]` and `BA = C^2` Find the values of p and q

Exercise 9(D) | Q 19 | Page 132

Given `A = [(3,-2),(-1,4)] B = [(6),(1)], C = [(-4),(5)] and D = [(2),(2)]` Find AB + 2C - 4D

Exercise 9(D) | Q 20 | Page 132

Evaluate:

`[(4sin 30^@,  2cos 60^@),(sin 90^@, 2 cos 0^@)][(4,5),(5,4)]`

Exercise 9(D) | Q 21 | Page 132

if A = `[(3,1),(-1,2)]` and `I = [(1,0),(0,1)]`, find `A^2 - 5A + 7I`

Exercise 9(D) | Q 22 | Page 132

Given A = `[(2,0), (-1,7)] and 1 = [(1,0), (0,1)]` and A2 = 9A +mI. Find m

Exercise 9(D) | Q 23.1 | Page 132

Given matrix A = `[(4sin30^@,cos0^@), (cos0^@,4sin30^@)] and B = [(4), (5)]` If AX = B.
Write the order of matrix X.

Exercise 9(D) | Q 23.2 | Page 132

Given matrix A = `[(4sin30^@,cos0^@), (cos0^@,4sin30^@)] and B = [(4), (5)]` If AX = B.
 Find the matrix 'X'

Exercise 9(D) | Q 24 | Page 132

If A = `[(1,3), (3,4)]` B = `[(-2,1), (-3,2)]` and `A^2 - 5B^2 = 5C` Find the matrix C where C is a 2 by 2 matrix. 

Exercise 9(D) | Q 25 | Page 132

Given matrix B =`[(1,1), (8,3)]` Find the matrix X if, X = B2 - 4B. Hence, solve for a and b given X`[(a), (b)] = [(5), (50)]`

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Chapter 9: Matrices

Exercise 9(A)Exercise 9(B)Exercise 9(C)Exercise 9(D)
Concise Mathematics Class 10 ICSE - Shaalaa.com

Selina solutions for Concise Mathematics Class 10 ICSE chapter 9 - Matrices

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Concepts covered in Concise Mathematics Class 10 ICSE chapter 9 Matrices are Introduction to Matrices, Addition and Subtraction of Matrices, Multiplication of Matrix, Matrices Examples.

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