说说y=a1.*exp(-sqrt((a2-lab)^2/a5(a3-cap)^2/a6(a4-xin)^2/a7))(1)x3>-1(2)6x

Question

说说y=a1.*exp(-sqrt((a2-lab)^2/a5 (a3-cap)^2/a6 (a4-xin)^2/a7))(1)x 3>-1 (2)6x

Answer 1

X^2-3XY 2Y^2比如an=1/n * (-1)^[(3 n)/2]=-(-1)^(n/2 1/2) /n比如u=u2(x) u2(y) u2(z)x=1 rcosA,y=-1 rsinA,r>0,A