# NCERT Class 11-Math's: Chapter –13 Limits and Derivatives Part 12

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**Question 57:**

(A)

(B)

(C)

(D)

**Answer: (B)**

**Question 58:**

(A)

(B)

(C)

(D)

**Answer: (A)**

**Question 59:**

(A)

(B)

(C)

(D)

**Answer: (C)**

**Question 60:**

(A)

(B)

(C)

(D)

**Answer: (C)**

**Question 61:**

is

(A)

(B)

(C)

(D)

**Answer: (D)**

**Question 62:**

is

(A)

(B)

(C)

(D) None of these

**Answer: (B)**

**Question 63:**

If , where[.]denotes the greatest integer function,

Then is equal to

(A)

(B)

(C)

(D) None of these

**Answer: (D)**

**Question 64:**

(A)

(B)

(C) Does not exist

(D) None of these

**Answer: (C)**

**Question 65:**

Let the quadratic equation whose roots are and is

(A)

(B)

(C)

(D)

**Answer: (D)**