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23 September, 23:15

The domain of the function is given. Find the range.

f (x) = 2x - 1

Domain: {-2, 0, 2, 4}

+3
Answers (2)
  1. 24 September, 02:21
    0
    The range is how much it spans in f (x), f (x) is a line, it has no max/min, so it's enough to substitute the least and greatest values of your domain:

    f (-2) = - 5, f (4) = 7,

    Range = [-5,7]
  2. 24 September, 02:42
    0
    The range is found by plugging in the values of the domain into 2x - 1

    So for x = - 2, f (x) = 2 (-2) - 1 = - 5

    The range will consist of - 5 and the other 3 values of f (x) found for x = 0, x=2 and x=4.
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