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Mathematics
Mathematics
Problem
Explain why the value
x
=
5
x=5
x
=
5
cannot belong to the domain of
f
′
f'
f
′
when
f
(
x
)
=
2
x
−
5
f(x)=\dfrac{2}{x-5}
f
(
x
)
=
x
−
5
2
.
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