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Question

Mathematics Question on Limits

Let a differentiable function ff satisfy f(x)+3xf(t)tdt=x+1,x3f(x)+\int\limits_3^x \frac{f(t)}{t} d t=\sqrt{x+1}, x \geq 3 Then 12f(8)12 f(8) is equal to :

A

19

B

17

C

1

D

34

Answer

1

Explanation

Solution

The correct option is (C) : 1