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Problem
Problem
Let
f
:
R
→
R
f: R \to R
f
:
R
→
R
be defined as
f
(
x
)
=
∣
x
∣
+
∣
x
2
−
1
∣
f(x) = |x| + |x^2 - 1|
f
(
x
)
=
∣
x
∣
+
∣
x
2
−
1∣
. Total number of points at which
f
f
f
attains either a local maximum or a local minimum is
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