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11 April, 12:28

If f (x) = x 2 + 1 and g (x) = 3x + 1, find 2f (1) + 3g (4).

1. 45

2. 43

3. 42

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Answers (1)
  1. 11 April, 12:40
    0
    f (x) = x^2 + 1

    f (1) = 1 ^2 + 1 = 2

    so 2f (1) = 2 (2) = 4

    g (x) = 3x + 1

    f (4) = 3 (4) + 1 = 13

    3g (4) = 3 (13) = 39

    2f (1) + 3g (4) = 4 + 39 = 43

    answer

    2. 43
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