# NCERT Class 12-Mathematics: Exemplar Chapter –7 Integrals Part 6

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**Question 23:**

is equal to

(A)

(B)

(C)

(D)

**Answer:**

(B) Is the correct answer?

Since by putting*,* we get

**Question 24:**

If and *g* are continuous functions in satisfying and, then is equal to

(A)

(B)

(C)

(D)

**Answer:**

B is the correct answer. Since

Or

**Question 25:**

If, then *a* is equal to

(A)

(B)

(C)

(D)

**Answer:**

(C) is the correct answer, since which gives

**Question 26:**

(A)

(B)

(C)

(D)

**Answer:**

(B) is the correct answer, since

**Question 27:**

(A)

(B)

(C)

(D)

**Answer:**

(B) Is the correct answer, since

Therefore,