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Commerce (English Medium) Class 12 - CBSE Question Bank Solutions for Mathematics

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3x + y = 19
3x − y = 23

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

2x − y = − 2
3x + 4y = 3

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

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3x + ay = 4
2x + ay = 2, a ≠ 0

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

2x + 3y = 10
x + 6y = 4

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

5x + 7y = − 2
4x + 6y = − 3

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

9x + 5y = 10
3y − 2x = 8

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

Given: x + 2y = 1
            3x + y = 4

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

The trace of the matrix \[A = \begin{bmatrix}1 & - 5 & 7 \\ 0 & 7 & 9 \\ 11 & 8 & 9\end{bmatrix}\], is

[3] Matrices
Chapter: [3] Matrices
Concept: undefined >> undefined

3x + y + z = 2
2x − 4y + 3z = − 1
4x + y − 3z = − 11

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

x − 4y − z = 11
2x − 5y + 2z = 39
− 3x + 2y + z = 1

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

6x + y − 3z = 5
x + 3y − 2z = 5
2x + y + 4z = 8

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

xy = 5
y + z = 3
x + z = 4

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

2y − 3z = 0
x + 3y = − 4
3x + 4y = 3

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

5x − 7y + z = 11
6x − 8y − z = 15
3x + 2y − 6z = 7

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

2x − 3y − 4z = 29
− 2x + 5y − z = − 15
3x − y + 5z = − 11

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

x + y + z + 1 = 0
ax + by + cz + d = 0
a2x + b2y + x2z + d2 = 0

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

3x + y = 5
− 6x − 2y = 9

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

3x − y + 2z = 3
2x + y + 3z = 5
x − 2y − z = 1

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

3x − y + 2z = 6
2x − y + z = 2
3x + 6y + 5z = 20.

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined

x − y + z = 3
2x + y − z = 2
− x − 2y + 2z = 1

[4] Determinants
Chapter: [4] Determinants
Concept: undefined >> undefined
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