已知f(1,2)=7-101n2为函数f(x,y)=αx2+bxy+αy2+clnx+dlny的极小值,则a、b、c、d分别为()
A.1,1,4,10 B.-1,-1,-4,-10 C.1,1,-4,-10 D.-1,-1,4,10正确答案C
已知f(1,2)=7-101n2为函数f(x,y)=αx2+bxy+αy2+clnx+dlny的极小值,则a、b、c、d分别为()
A.1,1,4,10 B.-1,-1,-4,-10 C.1,1,-4,-10 D.-1,-1,4,10正确答案C