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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` |
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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` |
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