若x+y+z=0且x,y,z互不相等.求x^2/(2x^2+yz)+y^2/(2y^+xz)+z^2/(2z^2+xy)
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若x+y+z=0且x,y,z互不相等.求x^2/(2x^2+yz)+y^2/(2y^+xz)+z^2/(2z^2+xy)
若x+y+z=0且x,y,z互不相等.求x^2/(2x^2+yz)+y^2/(2y^+xz)+z^2/(2z^2+xy)
若x+y+z=0且x,y,z互不相等.求x^2/(2x^2+yz)+y^2/(2y^+xz)+z^2/(2z^2+xy)
假设a=0 b=1 c=-1
则:
x^2/(2x^2+yz)+y^2/(2y^+xz)+z^2/(2z^2+xy)
=0/(0-1)+1/(2-0)+(-1)/(2+0)
=0+1/2-1/2
=0