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Mathematics
Problem
Let
f
(
x
)
=
∣
x
∣
f(x)=|x|
f
(
x
)
=
∣
x
∣
. Determine
d
f
d
x
\frac{df}{dx}
d
x
df
at
x
=
0
x=0
x
=
0
. a)
1
1
1
b) Does not exist c)
0
0
0
d)
−
1
-1
−
1
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