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18 December, 14:22

Find the range of f (x) = -x+4 for the domain (-3 - 2 - 1 1)

A.{7,6,5,3}

B.{7,6,5,4}

C.{-7,-6,-5,-4}

D.{-7,-6,-5,3}

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Answers (2)
  1. 18 December, 18:06
    0
    f (-3) = - -3 + 4 = 3+4 = 7

    f (-2) = - -2 + 4 = 2+4 = 6

    f (-1) = --1 + 4 = 1+4 = 5

    f (1) = - 1 + 4 = 3

    Range : {3,5,6,7}

    Choice A
  2. 18 December, 18:18
    0
    If we substitute x = - 3 in f (x) we have - -3 + 4 = 7 which is one element in the range.

    Doing the same calculation for x, - 2, - 1 and 1 we get 6, 5 and 3

    Answer is choice A
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