The function $f(x)=3x^2$ is :
Answer & explanation
Correct answer: option 3
The correct answer is option (3) → increasing in (0, ∞) and decreasing in (-∞, 0)
$f(x)=3x^2$
so $f'(x)=6x=0⇒x=0$
$f(x)$ = increasing in(-∞, -1) ∪ (1, ∞)
The function $f(x)=3x^2$ is :
Correct answer: option 3
The correct answer is option (3) → increasing in (0, ∞) and decreasing in (-∞, 0)
$f(x)=3x^2$
so $f'(x)=6x=0⇒x=0$
$f(x)$ = increasing in(-∞, -1) ∪ (1, ∞)