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Mathematics
Problem
To evaluate
∫
(
3
x
+
2
)
e
4
x
d
x
\int (3x+2)\,e^{4x}\,dx
∫
(
3
x
+
2
)
e
4
x
d
x
in one step, which of the following is the most suitable choice for
u
u
u
? a)
u
=
e
4
x
u = e^{4x}
u
=
e
4
x
b)
u
=
4
x
u = 4x
u
=
4
x
c)
u
=
3
x
+
2
u = 3x+2
u
=
3
x
+
2
d)
u
=
(
3
x
+
2
)
e
4
x
u = (3x+2)e^{4x}
u
=
(
3
x
+
2
)
e
4
x
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