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Question
Mathematics
If f(x) = 2x + 1 and g (x) = x2 + 1 then go(fof)(2) =
Q. If
f
(
x
)
=
2
x
+
1
and
g
(
x
)
=
x
2
+
1
then
g
o
(
f
o
f
)
(
2
)
=
2979
190
Relations and Functions - Part 2
Report Error
A
112
15%
B
122
51%
C
12
22%
D
124
11%
Solution:
(
g
o
(
f
∘
f
))
(
x
)
=
g
(
f
(
f
(
x
)))
=
g
(
f
(
2
x
+
1
))
=
g
(
2
(
2
x
+
1
)
+
1
)
=
g
(
4
x
+
3
)
=
(
4
x
+
3
)
2
+
1
(
g
o
(
f
o
f
))
(
2
)
=
(
11
)
2
+
1
=
122