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National
Medium
Functions
10–12
For
f
(
x
)
=
2
x
+
3
f(x) = 2^{x} + 3
f
(
x
)
=
2
x
+
3
, what is
f
−
1
(
11
)
f^{-1}(11)
f
−
1
(
11
)
?
Sendo
f
(
x
)
=
2
x
+
3
f(x) = 2^{x} + 3
f
(
x
)
=
2
x
+
3
, qual é
f
−
1
(
11
)
f^{-1}(11)
f
−
1
(
11
)
?
Answer options
A.
14
14
14
B.
8
8
8
C.
3
3
3
D.
4
4
4
Check Answer
Solution
Step 1 of 3
1.
f
−
1
(
11
)
f^{-1}(11)
f
−
1
(
11
)
is the value of
x
x
x
with
f
(
x
)
=
11
f(x) = 11
f
(
x
)
=
11
.
Next step
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