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17 May, 17:10

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. What is the output of the function f (x) = x + 21 if the input is 4? When the input is 4, the output of f (x) = x + 21 is?

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  1. 17 May, 17:44
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    The output = 25

    Step-by-step explanation:

    ∵ f (x) = x + 21

    ∵ The input is 4 ⇒ x = 4

    ∴ the output is the value of f (4)

    ∴ f (4) = x + 21 = 25

    ∴ The output is 25
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