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  QUESTION OF THE DAY  
Question of the day
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Question of the Day (08-Apr-17)

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If x and y are both real, what is the least possible value of the function f(x, y) = x2y2 − 4x2y + 4x2 − 2xy2 + 8xy − 8x + y2 − 4y + 7?
OPTIONS
 
 1)0
 2)1
 3)2
 4)3
 5)7

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