# NCERT Class 12-Mathematics: Chapter – 5 Continuity and Differentiability Part 18 (For CBSE, ICSE, IAS, NET, NRA 2023)

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**Question 59**:

If prove that

**Answer**:

Given:

Taking log on both the sides, we get

Or

On differentiating above with respect to , we get

Hence Proved

**Question 60**:

If , prove that

**Answer**:

Given:

Taking log on both the sides, we get

On differentiating both the sides with respect to , we get

Hence Proved

**Question 61**:

If show that

**Answer**:

Given:

Taking log both the sides, we get

differentiating both the sides, we get

Hence Proved