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1 March, 06:24

Explain how to find reasonable domain values for a function

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  1. C
    1 March, 09:00
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    A reasonable domain and range is the set of values that exist for the function. The sets that are not reasonable are not considered domain and range. For instance, f (x) = 15√ (x - 3)

    The reasonable domain is R, x ≥ 3 since you can't have negative value inside the radicand.

    The reasonable range is R, f (x) ≥ 0 since the minimum value is 0 [Noting that x = 3 gives f (3) = 15√ (3 - 3) = 15√0 = 0]
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