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18 June, 08:15

If f (x) = 2^x, the f (x+2) - f (x-2) =

a) 17/2^x

b) 15·2^ (x-2)

c) 17·2^ (x-2)

d) 15·2^x

e) 17·2^x

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Answers (1)
  1. 18 June, 09:11
    0
    F (x) = 2^x

    f (x+2) - f (x - 2) = 2^ (x + 2) - 2^ (x - 2) = 2^x (2^2) - 2^x (1/2^2) = 2^x (2^2 - 1/2^2) = 2^x (4 - 1/4) = 2^x (15/4) = 15 (2^x) (1/2^2) = 15·2^ (x-2)
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