1.

`(6sqrt((64)/(125)))^(-2)=`________A. `(5)/(16)`B. `(4)/(5)`C. `(5)/(4)`D. `(16)/(5)`

Answer» Correct Answer - C
`(6sqrt((64)/125))^(-2)=[((64)/125)^((1)/(6))]^(-2)=((64)/125)^(-(1)/3)=((5^3)/4^3)^((1)/(3))=(5)/(4)`
Hence the correct option is (c).


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