NCERT Class 12-Mathematics: Chapter –5 Continuity and Differentiability Part 15

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Question 47:

Answer:

Question 48:

Answer:

Question 49:

If

Answer:

Now ,

Taking on both sides to get,

For

Taking log on both sides we get,

Differentiating ,

Question 50:

If t

Answer:

And

Hence proved.

Question 51:

If , , find at .

Answer