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4 May, 22:05

If the function f is defined by function f of x (2 times x) plus 3, and if function f of a equals 11, what is the value of a?

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  1. 5 May, 00:20
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    F (x) = 2x + 3

    f (a) = 2a + 3

    when f (a) = 11

    11 = 2a + 3

    therefore 2a = 8

    and a = 4
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