1.

यदि `x^(2)+y^(2)=29` और `xy=10` जहां `xgt0,ygt0,xgty` हो तो `(x+y)/(x-y)` का मान ज्ञात कीजिये?A. `-7//3`B. `7//3`C. `3//7`D. `-3//7`

Answer» Correct Answer - B
`(x+y)^(2)=x^(2)+y^(2)+2xy`
`=29+2xx10`
`=49`
`x+y=7`
`(x-y)^(2)=x^(2)+y^(2)-2xy`
`=29-2xx10=9`
`(x-y)=3`
`(x+y)/(x-y)=7/3`


Discussion

No Comment Found

Related InterviewSolutions