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Mathematics
Mathematics
Problem
If
f
(
x
)
=
a
sin
(
log
x
)
f(x) = a \sin(\log x)
f
(
x
)
=
a
sin
(
lo
g
x
)
, then
x
2
f
′
′
(
x
)
+
x
f
′
(
x
)
=
x^2 f''(x) + x f'(x) =
x
2
f
′′
(
x
)
+
x
f
′
(
x
)
=
(a)
f
(
x
)
f(x)
f
(
x
)
(b)
−
f
(
x
)
-f(x)
−
f
(
x
)
(c) 0 (d) 1
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