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13 February, 11:15

7^-1+9^-1, how do you solve this exponent equation?

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  1. 13 February, 13:01
    Raising to a negative power just makes the base value into a fraction

    For example, x^-1 turns into (1/x^1)

    This means that your equation goes from

    7^-1+9^-1 to (1/7) + (1/9)

    1/7+1/9 simplifies to 16/63 after all of the common denominator stuff

    So, in short 7^-1+9^-1 = 16/63
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