JEE Main 2019 — Math solution | Fundamenthol

JEE Main2019Math

Q.

If S₁ and S₂ are respectively the sets of local minimum and local maximum points of the function, f(x) = 9x⁴ + 12x³ – 36x² + 25, x $\in$ R, then :

A
$S_{1} = {- 2}; S_{2} = {0, 1}$
B
$S_{1} = {- 2, 1}; S_{2} = {0}$
C
$S_{1} = {- 1}; S_{2} = {0, 2}$
D
$S_{1} = {- 2, 0}; S_{2} = {1}$

Solution

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