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Mathematics
Problem
Explain why the function
f
(
x
)
=
x
2
−
4
x
−
2
f(x)=\dfrac{x^{2}-4}{x-2}
f
(
x
)
=
x
−
2
x
2
−
4
has a discontinuity at
x
=
2
x=2
x
=
2
that can be removed rather than a vertical asymptote.
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