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19 February, 17:28

Evaluate the function.

a. f (x) = 3x+5 {-2,0,2}

b. g (x) = x-9 find g (5)

c. f (n) = (3-n) + 4 {-1,-2,3}

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Answers (1)
  1. 19 February, 18:42
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    Part a) The values of the function f (x) are {-1,5,11}

    Part b) The value of g (5) is - 4

    Part c) The values of the function f (n) are {8,9,4}

    Step-by-step explanation:

    Part a) we have

    f (x) = 3x+5

    Evaluate for {-2,0,2}

    1) For x=-2

    substitute the value of x in the function

    f (-2) = 3 (-2) + 5=-1

    2) For x=0

    substitute the value of x in the function

    f (0) = 3 (0) + 5=5

    3) For x=2

    substitute the value of x in the function

    f (2) = 3 (2) + 5=11

    Part b) we have

    g (x) = x-9

    Evaluate for x=5

    substitute the value of x in the function

    g (5) = 5-9=-4

    Part c) we have

    f (n) = (3-n) + 4

    Evaluate for {-1,-2,3}

    1) For n=-1

    substitute the value of n in the function

    f (-1) = (3 - (-1)) + 4=8

    2) For n=-2

    substitute the value of n in the function

    f (-2) = (3 - (-2)) + 4=9

    3) For n=3

    substitute the value of n in the function

    f (3) = (3 - (3)) + 4=4
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