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![[Post New]](/templates/default/images/icon_minipost_new.gif) 9 Feb 2008 13:43:51 IST
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Find the least value of x2 + 2xy + 2y2 + 4y + 7?
a) -1
b) 1
c) 3
d) 7
Please answer the question with a precise explanation.
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Ans. is 3....see...the exp. can be written as (x+y)^2 +(y+2)^2 +3.....the least value will be 3 wen x=2,y= -2...for all oder values of x,y;square exp. will be positive n hence whole exp. wil be gr8r dan 3...
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MaNuTd RoXxXx..MaNuTd 2 WiN PrEmIeR LeAgUe ThIs SeAsOn ToO AlOnG WiTh ChAmPiOnS LeAgUe.....HaiL RoNaLdO ...HaiL LaMpArD... |
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9 Feb 2008 13:55:12 IST
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Well this was an easy 1 how come I did not see this way???
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