Find the maximum value of y in the equation y = 1 - 2x - ...
Find the maximum value of y in the equation y = 1 - 2x - 3x2
5/4
5/3
3/4
4/3
Correct answer is D
y=1−2x−3x2
At maximum point, dydx=0
dydx=−2−6x
−2−6x=0⟹−2=6x
x=−13
At x = −13, y = 1−2(−13)−3(−13)2
= 1+23−13
= 43
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