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यदि `x=2015, y=2014` और `z=2013` है तो `x^(2)+y^(2)+z^(2)-xy-yz-xz` का मान क्या है?A. 3B. 4C. 6D. 2 |
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Answer» Correct Answer - A `x=2015` `y=2014` `z=2013` `=x^(2)+y^(2)+z^(2)-xy-yz-zx=` `1/2[(x-y)^(2)+(y-z)^(2)+(z-x)^(2)]` `= 1/2[(2015-2014)^(2)+(2014` `-2013)^(2)+(2013-2015)^(2)]` `=1/2(1+1+4)=3` |
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