Function Composition & Inverses - Mrs. Rivero's Math Classes
[Pages:3]Algebra 2
Function Composition & Inverses
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Find the inverse of each function.
1)
g(x) = -4 +
1 x
5
Name___________________________________ Date________________
2)
g(n) = -3 -
1 n
2
3) f (n) = -2n5 + 3
4)
g(n) =
3
n-3 -1
5) h(n) = 2 + 3
n
State if the given functions are inverses.
6) f (x) = 1 x + 1
2 2
g(x) = 2x - 1
7) g(x) = x - 1 f (x) = 2 + 3 x
5
8)
g(n) =
3
-n - 1
f (n) = (n - 3)3
9)
g(x) =
3
x
f (x) =
5
x + 1
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-1-
Worksheet by Kuta Software LLC
10) f (x) = 2 + 1
x + 2
h(x) = - 2 - 2
-x + 1
Perform the indicated operation.
12) g(t) = 4t - 2 h(t) = t + 4 Find g(h(t))
14) g(n) = n + 4 h(n) = 3n + 4 Find g(h(n))
16) f (t) = -2t2 + 4 g(t) = t - 5 Find f (g(t))
18) f (x) = x + 2 g(x) = 3x - 4 Find f (g(x))
20) f (a) = -3a3 - 2 g(a) = a + 4 Find f (g(a))
11) h(x) = 4
-x + 2
f (x) = - 3
x - 1
13) g(x) = 4x + 3 f (x) = x2 - 4 Find g( f (x))
15) f (x) = x3 - 2x g(x) = 3x Find f (g(x))
17) h(t) = -3t + 4 g(t) = t2 + 4t Find h(g(t))
19) h(x) = 4x + 3 Find h(h(x))
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-2-
Worksheet by Kuta Software LLC
Answers to Function Composition & Inverses
1) g-1(x) = 5x + 20
2) g-1(n) = -2n - 6
5) h-1(n) = 2
n - 3
6) Yes
9) No
10) Yes
13) 4x2 - 13
14) 3n + 8
17) -3t2 - 12t + 4
18) 3x - 2
20) -3a3 - 36a2 - 144a - 194
3) f -1(n) = 5 -n + 3
2 7) No
11) No 15) 27x3 - 6x 19) 16x + 15
4) g-1(n) = 3 + (n + 1)3
8) No
12) 4t + 14 16) -2t2 + 20t - 46
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-3-
Worksheet by Kuta Software LLC
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