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Mathematics
Mathematics
Problem
The derivative of
f
(
x
)
=
x
∣
x
∣
f(x) = x|x|
f
(
x
)
=
x
∣
x
∣
is (a)
2
x
2x
2
x
(b)
−
2
x
-2x
−
2
x
(c)
2
x
2
2x^2
2
x
2
(d)
2
∣
x
∣
2|x|
2∣
x
∣
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