Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Problem
Problem
Let the function
f
f
f
be defined by
f
(
x
)
=
2
x
+
1
1
−
3
x
f(x)=\frac{2x+1}{1-3x}
f
(
x
)
=
1
−
3
x
2
x
+
1
, then
f
−
1
(
x
)
f^{-1}(x)
f
−
1
(
x
)
is (a)
x
−
1
3
x
+
2
\frac{x-1}{3x+2}
3
x
+
2
x
−
1
(b)
3
x
+
2
x
−
1
\frac{3x+2}{x-1}
x
−
1
3
x
+
2
(c)
x
+
1
3
x
−
2
\frac{x+1}{3x-2}
3
x
−
2
x
+
1
(d)
2
x
+
1
1
−
3
x
\frac{2x+1}{1-3x}
1
−
3
x
2
x
+
1
Browse the problem library