Question

Let a differentiable function f satisfy f(x) \(+\int\limits_3^x\frac{f(t)}{t}dt=\sqrt{x+1},x≥3.\) Then 12f (8) is equal to

(1) 34 

(2) 19 

(3) 17 

(4) 1

Answer 1

Correct option is (3) 17 

Also putting x = 3 in given equation f(3) + 0 = √4