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Mathematics
Mathematics
Problem
Let
f
(
x
)
=
3
x
+
5
f(x) = 3x + 5
f
(
x
)
=
3
x
+
5
, then show that
f
(
x
)
f(x)
f
(
x
)
is strictly increasing and
f
−
1
(
x
)
f^{-1}(x)
f
−
1
(
x
)
exists and is strictly increasing for
x
∈
R
x \in \mathbb{R}
x
∈
R
.
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