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85

Step-by-step Answer
PAGE: 139SET: ExercisesPROBLEM: 85
Please look in your text book for this problem Statement

(a)

Differentiate the function

Product rule of derivatives: .

.

(b)

We have

If .

(c)

The function is 

Let

Now find .

Substitute value in.

(a)

(b)

(c)  .



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