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Mathematics
Mathematics
Problem
If
f
(
x
)
=
∣
x
∣
f(x) = |x|
f
(
x
)
=
∣
x
∣
, then
f
′
(
0
)
=
f'(0) =
f
′
(
0
)
=
(a) 0 (b) 1 (c)
x
x
x
(d) None of these
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