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यदि `x^(2)-y^(2)=80` और `x-y=8` है तो `x` और `y` का औसत ज्ञात करें।A. 2B. 3C. 4D. 5 |
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Answer» Correct Answer - D `x^(2)-y^(2)=80` `implies (x-y)(x+y)=80` `x-y=8`………….i `:. (x+y)xx8=80` `(x+y)=10`…………..ii Now average of `x` and `y` `=(x=y)/2=10/2=5` |
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