几道奥数计算题1/(a-b)+1/(a+b)+2a/(a^2+b^2)+(4a^3)/(a^4+b^4)=?[(x^2+yz)/(x^2+(y+z)-yz)]+[(y^2-zx)/(y^2+(z+x)y+zx)]+[(z^2+xy)/(z^2-(x-y)z-xy]会多少写多少

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几道奥数计算题1/(a-b)+1/(a+b)+2a/(a^2+b^2)+(4a^3)/(a^4+b^4)=?[(x^2+yz)/(x^2+(y+z)-yz)]+[(y^2-zx)/(y^2+(z+x)y+zx)]+[(z^2+xy)/(z^2-(x-y)z-xy]会多少写多少
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几道奥数计算题1/(a-b)+1/(a+b)+2a/(a^2+b^2)+(4a^3)/(a^4+b^4)=?[(x^2+yz)/(x^2+(y+z)-yz)]+[(y^2-zx)/(y^2+(z+x)y+zx)]+[(z^2+xy)/(z^2-(x-y)z-xy]会多少写多少
几道奥数计算题
1/(a-b)+1/(a+b)+2a/(a^2+b^2)+(4a^3)/(a^4+b^4)=?
[(x^2+yz)/(x^2+(y+z)-yz)]+[(y^2-zx)/(y^2+(z+x)y+zx)]+[(z^2+xy)/(z^2-(x-y)z-xy]
会多少写多少

几道奥数计算题1/(a-b)+1/(a+b)+2a/(a^2+b^2)+(4a^3)/(a^4+b^4)=?[(x^2+yz)/(x^2+(y+z)-yz)]+[(y^2-zx)/(y^2+(z+x)y+zx)]+[(z^2+xy)/(z^2-(x-y)z-xy]会多少写多少
1/(a-b)+1/(a+b)+2a/(a^2+b^2)+(4a^3)/(a^4+b^4)
=2a/(a^2-b^2)+2a/(a^2+b^2)+(4a^3)/(a^4+b^4)
=(4a^3)/(a^4-b^4)+(4a^3)/(a^4+b^4)
=8a^7/(a^8-b^8)
第二题是不是这样的?
[(x^2+yz)/(x^2+(y+z)x-yz)]+[(y^2-zx)/(y^2+(z+x)y+zx)]+[(z^2+xy)/(z^2-(x-y)z-xy]