1.

If ` (x)/(y)+(y)/(x)=-1`, where` x,y ne 0` then the value of `(x^3-y^3)` isA. 1B. -1C. 0D. `(1)/(2)`

Answer» Correct Answer - C
`(x)/(y)+(y)/(x)=-1 rArr x^2+y^2+xy=0`
`rArr (x-y)(x^2-y^2+xy)=0 rArr x^3-y^3=0`.


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