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Mathematics
Mathematics
Problem
If
f
(
x
)
=
7
−
3
x
f(x)=7-3x
f
(
x
)
=
7
−
3
x
, then
f
−
1
(
x
)
f^{-1}(x)
f
−
1
(
x
)
equals a)
x
−
7
3
\dfrac{x-7}{3}
3
x
−
7
b)
7
−
3
x
7-3x
7
−
3
x
c)
7
−
x
3
\dfrac{7-x}{3}
3
7
−
x
d)
7
3
−
x
\dfrac{7}{3}-x
3
7
−
x
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