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Mathematics
Problem
Explain why any critical number of the function
f
(
x
)
=
ln
(
5
−
2
x
)
f(x)=\ln(5-2x)
f
(
x
)
=
ln
(
5
−
2
x
)
must satisfy
x
<
2.5
x<2.5
x
<
2.5
.
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