Posted by **alya** on Wednesday, May 2, 2012 at 5:53am.

determine the value of the constant α so that f(x,y) is continuous at (1,-1) if

f(x,y):

i)sin(x+y)/(x^(2 )– y^2 (x,y)≠(0,0)

ii) α (x,y)=(0,0)

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