CUET Preparation Today
CUET
-- Mathematics - Section A
Continuity and Differentiability
a
b
c
d
$f(x)$ is increasing when $f'(x)>0$
$⇒f'(x)=0$
$⇒12x(4x^2-1)=0$
$⇒12x(2x-1)(2x+1)=0$
∴ f(x) is increasing when,
$x∈\left(-\frac{1}{2},0\right)∪\left(\frac{1}{2},∞\right)$
