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Problem
Problem
If
f
:
R
→
R
f: R \rightarrow R
f
:
R
→
R
is defined by
f
(
x
)
=
3
x
−
4
f(x) = 3x - 4
f
(
x
)
=
3
x
−
4
, then
f
−
1
:
R
→
R
f^{-1}: R \rightarrow R
f
−
1
:
R
→
R
is (a)
4
−
3
x
4 - 3x
4
−
3
x
(b)
x
+
4
3
\frac{x+4}{3}
3
x
+
4
(c)
1
3
x
−
4
\frac{1}{3x-4}
3
x
−
4
1
(d)
3
x
+
4
\frac{3}{x+4}
x
+
4
3
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