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Mathematics
Problem
Let
f
(
x
)
=
(
x
2
+
1
)
sin
x
e
x
f(x)=(x^{2}+1)\sin x\,e^{x}
f
(
x
)
=
(
x
2
+
1
)
sin
x
e
x
. What is
f
′
(
0
)
f'(0)
f
′
(
0
)
? a)
0
0
0
b)
−
1
-1
−
1
c)
1
1
1
d)
2
2
2
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