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05-11-2018
Mathematics

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Simplify 7^-9 x 7^-7x 7^-9 leaving your answer in the form a^n where a is a whole number

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05-11-2018

[tex] {7}^{ - 9} \times {7}^{ - 7} \times {7}^{ - 9} \\ = {7}^{ (- 9) + ( - 7) + ( - 9)} \\ = {7}^{ - 9 - 7 - 9} \\ = {7}^{ - 25} [/tex]

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