Question

已知x,y,z满足.已知x,y,z满足（1）a的x减z加m方b的3次方与b的m方a是同类项（2）y减z减2的差的平方加n

Answer 1

a^(x-z+m)b^3与b^ma是同类项

则：m=3,x-z+m=1

x-z=-2

(y-z-2)^2+|n-2|=0

y-z=2,n=2

x-y=(x-z)-(y-z)=-2-2=-4

1/2[(x-y)的m-1方+（y-z）的n方+（z-x）的平方]

=1/2[(-4)^2+2^2+2^2]

=24/2

=12