AM-2190

Stationary points

A Math · Secondary 4 · Medium · Stationary points

A rectangle has height

k

units and width

w

units. Its area is given by

A = 12k - 3k^2

. Find the value of

k

for which the area is stationary.

$2$
$\dfrac{12}{3}$
$\dfrac{1}{2}$
$6$

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