CUET Preparation Today
CUET
-- Mathematics - Section B1
Relations and Functions
The intervals in which the function $f(x)=2x^3+9x^2+12x+20$ is increasing is given by :
$(-2, -1)$
$(-∞, -2)$
$(-∞,-2) ∪ (-1, ∞)$
$(-∞, ∞)$
