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Mathematics
Problem
Explain why the function
f
(
x
)
=
7
−
2
x
f(x)=\sqrt{7-2x}
f
(
x
)
=
7
−
2
x
is continuous at
x
=
2
x=2
x
=
2
but not continuous at
x
=
4
x=4
x
=
4
.
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