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Mathematics
Mathematics
Problem
Prove that
lim
x
→
∞
(
x
2
+
5
)
e
−
0.5
x
cos
3
x
=
0
\displaystyle \lim_{x\to\infty} (x^2 + 5) e^{-0.5 x} \cos 3x = 0
x
→
∞
lim
(
x
2
+
5
)
e
−
0.5
x
cos
3
x
=
0
.
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