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5 March, 02:58

If f (x) = { (3,5), (2,4), (1,7) } and g (x) = square root (x-3) what do i do to determine (f+g) (1) ... ?

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  1. 5 March, 03:15
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    (f + g) (1) = f (1) + g (1)

    f (1) = 7

    g (1) = √ (1 - 3) = √ ( - 2) = √ 2 · √ (-1) = i √ 2 (we know that √ ( - 1) = i, or irrational number)

    Answer:

    (f + g) (1) = 7 + i √ 2
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