Express each of the following as rationa...

Express each of the following as rational number : `(a) (-5/7)^(-4)` `(b) (2/3)^(-2)`

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Express each of the following as a rational number: ( i ) 4^(-3) ( ii ) (-3)^(-5) ( iii ) (frac(1)(2))^(-4) ( iv ) (frac(-2)(5))^(-3)

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