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Algebra IIB - Chapter 6
Test Description: Functions
Instructions: Answer all questions to get your test result.
1) If f(x) = 3x - 4 find f(-2)
A
2
B
-10
C
10
D
-2
2) (-2, 3) and (4,7) form a relation. Find its inverse
A
(-2, 7) and 3, 4)
B
(3, -2) and (7, 4)
C
(-2, 4) and (3, 7)
D
(2, -3) and (-4, -7)
3) If f(x) = 5x + 2 and g(x) = -3x + 1 find (f + g)(x)
A
8x + 3
B
2x - 1
C
2x + 3
D
15x^2 + 2
4) If f(x) = 8x and g(x) = 2x + 1 find (f - g)(x)
A
-6x - 1
B
6x + 1
C
-4x + 1
D
6x - 1
5) If f(x) = 4 and g(x) = x + 3 find (f * g)(x)
A
x + 12
B
x + 7
C
4x + 3
D
4x + 12
6) If f(x) = 6x and g(x) = x + 2 find (f + g)(4)
A
7x + 2
B
22
C
30
D
24
7) If f(x) = -2x + 5 and g(x) = 7x find (f o g)(x)
A
14x^2 + 5
B
-14x + 5
C
-14x - 35
D
5x + 5
8) If f(x) = x - 6 find the inverse function.
A
6x
B
x + 6
C
x/6
D
x - 12
9) If f(x) = 7x find the inverse function.
A
x7
B
x - 7
C
x/7
D
x + 7
10) If f(x) = 2x + 6 find the inverse function.
A
x/2 - 3
B
x - 6
C
x/2 + 3
D
2x - 6
*select an answer for all questions
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