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Prove that
ƒ(x) =
is discontinuous at x=2
LHL:
=
= 4
RHL:
=
= 0
f(x) is discontinuous at x=2
1
is discontinuous at x=2
=
=
f(x) is discontinuous at x=2is discontinuous at x=2 = =f(x) is discontinuous at x=2