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Mathematics
Problem
Let
f
(
x
)
=
5
x
+
2
f(x)=5^{x}+2
f
(
x
)
=
5
x
+
2
. Which of the following is
f
−
1
(
x
)
f^{-1}(x)
f
−
1
(
x
)
? a)
log
5
(
x
+
2
)
\log_5(x+2)
lo
g
5
(
x
+
2
)
b)
log
5
(
x
)
−
2
\log_5(x)-2
lo
g
5
(
x
)
−
2
c)
log
5
(
x
−
2
)
\log_5(x-2)
lo
g
5
(
x
−
2
)
d)
log
5
x
+
2
\log_5 x +2
lo
g
5
x
+
2
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