F(x1,x2) = U(x1,x2) + b[p1*x1 + p2*x2 - M].
其中,b为待定常数.
0 = dF(x1,x2)/dx1 = MU1 + bp1,
0 = dF(x1,x2)/dx2 = MU2 + bp2,
所以,
a = -b = MU1/p1 = MU2/p2.
F(x1,x2) = U(x1,x2) + b[p1*x1 + p2*x2 - M].
其中,b为待定常数.
0 = dF(x1,x2)/dx1 = MU1 + bp1,
0 = dF(x1,x2)/dx2 = MU2 + bp2,
所以,
a = -b = MU1/p1 = MU2/p2.