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Mathematics
Mathematics
Problem
If
d
d
x
f
(
x
)
=
4
x
3
−
3
x
4
\frac{d}{dx} f(x) = 4x^3 - \frac{3}{x^4}
d
x
d
f
(
x
)
=
4
x
3
−
x
4
3
such that
f
(
2
)
=
0
f(2) = 0
f
(
2
)
=
0
. Then
f
(
x
)
f(x)
f
(
x
)
is (A)
x
4
+
1
x
3
−
129
8
x^4 + \frac{1}{x^3} - \frac{129}{8}
x
4
+
x
3
1
−
8
129
(B)
x
3
+
1
x
4
+
129
8
x^3 + \frac{1}{x^4} + \frac{129}{8}
x
3
+
x
4
1
+
8
129
(C)
x
4
+
1
x
3
+
129
8
x^4 + \frac{1}{x^3} + \frac{129}{8}
x
4
+
x
3
1
+
8
129
(D)
x
3
+
1
x
4
−
129
8
x^3 + \frac{1}{x^4} - \frac{129}{8}
x
3
+
x
4
1
−
8
129
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