# Balbharati solutions for Mathematics and Statistics 1 (Commerce) 11th Standard Maharashtra State Board chapter 8 - Continuity [Latest edition]

## Chapter 8: Continuity

Exercise 8.1Miscellaneous Exercise 8
Exercise 8.1 [Pages 111 - 112]

### Balbharati solutions for Mathematics and Statistics 1 (Commerce) 11th Standard Maharashtra State Board Chapter 8 Continuity Exercise 8.1 [Pages 111 - 112]

Exercise 8.1 | Q 1. (i) | Page 111

Examine the continuity of f(x) = x3 + 2x2 − x − 2 at x = –2.

Exercise 8.1 | Q 1. (ii) | Page 111

Examine the continuity of f(x) = (x^2 - 9)/(x - 3) on R.

Exercise 8.1 | Q 2. (i) | Page 111

Examine whether the function is continuous at the points indicated against them:
f(x) = x3 − 2x + 1,         for x ≤ 2
= 3x − 2,                 for x > 2, at x = 2

Exercise 8.1 | Q 2. (ii) | Page 112

Examine whether the function is continuous at the points indicated against them:
f(x) = (x^2 + 18x - 19)/(x - 1)        for x ≠ 1

= 20                               for x = 1, at x = 1

Exercise 8.1 | Q 3. (i) | Page 112

Test the continuity of the following function at the points indicated against them:

f(x) = (sqrt(x - 1) - (x - 1)^(1/3))/(x - 2)  for x ≠ 2

= 1/5                                  for x = 2, at x = 2

Exercise 8.1 | Q 3. (ii) | Page 112

Test the continuity of the following function at the points indicated against them:

"f"(x) = (x^3 - 8)/(sqrt(x + 2) - sqrt(3x - 2))  for x ≠ 2
= – 24                               for x = 2, at x = 2

Exercise 8.1 | Q 3. (iii) | Page 112

Test the continuity of the following function at the points indicated against them:

f(x) = 4x + 1,              for x ≤ 3

= (59 - 9x)/3,        for x > 3 at x = 8/3.

Exercise 8.1 | Q 3. (iv) | Page 112

Test the continuity of the following function at the points indicated against them:

f(x) = (x^3 - 27)/(x^2 - 9)  for 0 ≤ x <3

= 9/2             for 3 ≤ x ≤ 6, at x = 3

Exercise 8.1 | Q 4. (i) | Page 112

If f(x) = (24^x - 8^x - 3^x + 1)/(12^x - 4^x - 3^x + 1) for x ≠ 0

= k,                               for x = 0
is continuous at x = 0, find k.

Exercise 8.1 | Q 4. (ii) | Page 112

If f(x) = (5^x + 5^-x - 2)/(x^2)  for x ≠ 0

= k                            for x = 0
is continuous at x = 0, find k

Exercise 8.1 | Q 4. (iii) | Page 112

For what values of a and b is the function

f(x) = ax + 2b + 18    for x ≤ 0

= x2 + 3a − b            for 0 < x ≤ 2

= 8x – 2                     for x > 2,

continuous for every x ?

Exercise 8.1 | Q 4. (iv) | Page 112

For what values of a and b is the function

f(x) = (x^2 - 4)/(x - 2)      for x < 2

= ax2 − bx + 3         for 2 ≤ x < 3
= 2x – a + b             for x ≥ 3
continuous in its domain.

Miscellaneous Exercise 8 [Page 113]

### Balbharati solutions for Mathematics and Statistics 1 (Commerce) 11th Standard Maharashtra State Board Chapter 8 Continuity Miscellaneous Exercise 8 [Page 113]

Miscellaneous Exercise 8 | Q I. (1) | Page 113

Discuss the continuity of the following function at the point(s) or in the interval indicated against them:

f(x) = 2x2 − 2x + 5  for 0 ≤ x < 2

= (1 - 3x - x^2)/(1 - x)     for 2 ≤ x < 4

= (7 - x^2)/(x - 5)  for 4 ≤ x ≤ 7 on its domain.

Miscellaneous Exercise 8 | Q I. (2) | Page 113

Discuss the continuity of the following function at the point(s) or in the interval indicated against them.

f(x) = (3^x + 3^-x - 2)/x^2  for x ≠ 0.

= (log3)2                         for x = 0 at x = 0

Miscellaneous Exercise 8 | Q I. (3) | Page 113

Discuss the continuity of the following function at the point(s) or in the interval indicated against them:

f(x) = (5^x - e^x)/(2x)  for x ≠ 0

= 1/2(log5−1)         for x = 0 at x = 0

Miscellaneous Exercise 8 | Q I. (4) | Page 113

f(x) = (sqrt(x + 3) - 2)/(x^3 - 1)  for x ≠ 1

= 2    for x = 1, at x = 1.

Miscellaneous Exercise 8 | Q I. (5) | Page 113

f(x) = (log x - log 3)/(x - 3) for x ≠ 3

= 3                                for x = 3, at x = 3.

Miscellaneous Exercise 8 | Q II. (1) | Page 113

Find k if the following function is continuous at the points indicated against them:

f(x) = ((5x - 8)/(8 - 3x))^(3/(2x - 4)  for x ≠ 2
= k                           for x = 2 at x = 2.

Miscellaneous Exercise 8 | Q II. (2) | Page 113

Find k if the following function is continuous at the points indicated against them:

f(x) = (45^x - 9^x - 5^x + 1)/((k^x - 1)(3^x - 1))  for x ≠ 0

= 2/3                  for x = 0, at x = 0

Miscellaneous Exercise 8 | Q II. (3) | Page 113

Find k if the following function is continuous at the points indicated against them:

f(x) = (1 + kx)^(1/x)  , for x ≠ 0

= e^(3/2)                  ,  for x = 0, at x = 0

Miscellaneous Exercise 8 | Q III. (1) | Page 113

Find a and b if the following function is continuous at the point indicated against them.

f(x) = x^2 + a    , for x ≥ 0

= 2sqrt(x^2 + 1) + b , for x < 0 and
f(1) = 2 is continuous at x = 0

Miscellaneous Exercise 8 | Q III. (2) | Page 113

Find a and b if the following function is continuous at the point indicated against them.

f(x) = (x^2 - 9)/(x - 3) + "a"         , for x > 3
= 5                             , x = 3
= 2x2 + 3x + b          , for x < 3
is continuous at x = 3

Miscellaneous Exercise 8 | Q III. (3) | Page 113

Find a and b if the following function is continuous at the point indicated against them.

f(x) = (32^x - 1)/(8^x - 1) + a , for x > 0
= 2                      , for x = 0
= x + 5 − 2b       , for x < 0
is continuous at x = 0

## Chapter 8: Continuity

Exercise 8.1Miscellaneous Exercise 8

## Balbharati solutions for Mathematics and Statistics 1 (Commerce) 11th Standard Maharashtra State Board chapter 8 - Continuity

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Concepts covered in Mathematics and Statistics 1 (Commerce) 11th Standard Maharashtra State Board chapter 8 Continuity are Continuous and Discontinuous Functions, Continuity of a Function at a Point, Definition of Continuity, Continuity from the Right and from the Left, Properties of Continuous Functions, Continuity in the Domain of the Function, Examples of Continuous Functions Whereever They Are Defined.

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