Refer to attachment below — Class 9 Maths
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Answer:
2} 64 can be written as 4 power 3
[4^3]^-2/3
in powers======3 x -2/3 ..... 3 and 3 are cancelled so that gives 4 power -2 which is 1/16
125 can be written as [5^3]^-2/3
in powers=======3 x -2/3 which gives 5^-2 which is 1/25
1/16/1/25== 25/16=== [5/4]^2