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Derivatives
hard
0:00.0
Find the second derivative of
f
(
x
)
=
x
e
−
x
f(x) = x e^{-x}
f
(
x
)
=
x
e
−
x
at
x
=
0
x=0
x
=
0
.
A
2
2
2
B
1
1
1
C
−
2
-2
−
2
D
0
0
0
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