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19 May, 01:04

Evaluate 1/x^-2 for x = 7.

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Answers (2)
  1. 19 May, 01:34
    0
    1/x^-2 for x = 7

    1 / (7) ^-2

    1 / (1 / (7) ^2)

    1 / (1/49)

    49
  2. 19 May, 03:48
    0
    The negative exponent means you take the reciprocal, so it changes to x^2. Plug in 7, and you get 49
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