Answer:
.
f(x) = (|x|)3
At
x = 0
L.H.D.
=
=
0
R.H.D.
=
Since
L.H.D. = R.H.D.
Now
again for
f?
(x) = 3x |x|
=
3 [|x| + |x|] = 6 |x|
Now
for x = 0
f?(x)
= 0
To
find f? (x) at x = 0
L.H.D.
R.H.D.
Since
L.H.D. = R.H.D.
Hence
the result.
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