First slide

Diffrentiation

Question

The derivative of f(x) = x³ + 3x $ℓ$ nx + 5 with respect to x is :

Moderate

A

3x²+ 3x
B

3x² + 3 $ℓ$ nx + 3
C

3x² + 3 $ℓ$ nx + 5
D

3x² 3 $ℓ$ nx + 8

Solution

$\begin{array}{l} f^{'} (x) = 3 x^{2} + 3 x (\frac{1}{x}) + (ℓ n x) 3 + 0 \\ = 3 x^{2} + 3 ℓ n x + 3 \end{array}$

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