For the curve given by and

MATHEMATICS · Single correct · AP · Calculus BC · Parametric, Polar, and Vector-Valued Functions · Parametric, Polar, and Vector-Valued Functions

Problem

For the curve given by

x=t e^{t}

and

y=e^{t}

, a horizontal tangent occurs when (a)

t=-1

(b)

t=0

(c) the curve has no horizontal tangent for any real

t

(d)

t=1

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