Algebra IIB - Chapter 6 Question Preview (ID: 23160)


Functions. TEACHERS: click here for quick copy question ID numbers.

If f(x) = 3x - 4 find f(-2)
a) -10
b) 2
c) -2
d) 10

(-2, 3) and (4,7) form a relation. Find its inverse
a) (2, -3) and (-4, -7)
b) (-2, 4) and (3, 7)
c) (3, -2) and (7, 4)
d) (-2, 7) and 3, 4)

If f(x) = 5x + 2 and g(x) = -3x + 1 find (f + g)(x)
a) 8x + 3
b) 15x^2 + 2
c) 2x - 1
d) 2x + 3

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

If f(x) = 4 and g(x) = x + 3 find (f * g)(x)
a) 4x + 12
b) x + 12
c) x + 7
d) 4x + 3

If f(x) = 6x and g(x) = x + 2 find (f + g)(4)
a) 7x + 2
b) 30
c) 24
d) 22

If f(x) = -2x + 5 and g(x) = 7x find (f o g)(x)
a) 5x + 5
b) -14x - 35
c) -14x + 5
d) 14x^2 + 5

If f(x) = x - 6 find the inverse function.
a) 6x
b) x/6
c) x + 6
d) x - 12

If f(x) = 7x find the inverse function.
a) x/7
b) x + 7
c) x - 7
d) x7

If f(x) = 2x + 6 find the inverse function.
a) x - 6
b) x/2 - 3
c) x/2 + 3
d) 2x - 6

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