AM-1868

Stationary points

A Math · Secondary 4 · Medium · Stationary points

A curve has equation

y = x^3 - 6x^2 + 9x

. Find the

x

-coordinate of its stationary point.

$x = 1$ or $x = 3$
$x = -1$ or $x = -3$
$x = 1$ only
$x = 3$ only

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