Question

For the function

f
(
x
)
=
5
(
x
+
10
)
f(x)=5(x+10), find
f
−
1
(
x
)
f
−1
(x).


f
−
1
(
x
)
=
5
x
−
10
f
−1
(x)=5x−10

f
−
1
(
x
)
=
x
5
−
10
f
−1
(x)=
5
x
​
−10

f
−
1
(
x
)
=
x
+
10
5
f
−1
(x)=
5
x+10
​


f
−
1
(
x
)
=
5
(
x
−
10
)
f
−1
(x)=5(x−10)

Answer 1

f-1(x) = x/5 - 10

Explanation:

f(x)=5(x+10), f-1(x) = x/5 - 10