First slide

Diffrentiation

Question

The value of f"(x) at x = 1 for the function f(x) = x $ℓ$ n x is

Easy

A

$ℓ$ n2
B

2
C

1
D

0

Solution

$\begin{array}{l} f^{'} (x) = \frac{x}{x} + (ℓ n x) = 1 + ℓ n x \\ f^{''} (x) = \frac{1}{x} \end{array}$

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