1/(x-2)+1/(x+2)+2x/(x平方+4)+4x三次方/(x四次方+16)如题
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1/(x-2)+1/(x+2)+2x/(x平方+4)+4x三次方/(x四次方+16)如题1/(x-2)+1/(x+2)+2x/(x平方+4)+4x三次方/(x四次方+16)如题1/(x-2)+1/(x
1/(x-2)+1/(x+2)+2x/(x平方+4)+4x三次方/(x四次方+16)如题
1/(x-2)+1/(x+2)+2x/(x平方+4)+4x三次方/(x四次方+16)
如题
1/(x-2)+1/(x+2)+2x/(x平方+4)+4x三次方/(x四次方+16)如题
=(x+2+x-2)/(x平方-4)+2x/(x平方+4)+4x三次方/(x四次方+16)
=2x/(x平方-4)+2x/(x平方+4)+4x三次方/(x四次方+16)
=(2x三次方+8x+2x三次方-8x)/(x四次方-16)+4x三次方/(x四次方+16)
=4x三次方/(x四次方-16)+4x三次方/(x四次方+16)
=(4x五次方+16*4x三次方+4x五次方-16*4x三次方)/(x八次方-256)
=8x五次方/(x八次方-256)
1/(x-2)+1/(x+2)=[(x+2)+(x-2)]/[(x-2)(x+2)]=2x/(x^2-4)
同理 2x/(x^2-4)+2x/(x^2+4)=2x[(x^2+4)+(x^2-4)]/(x^4-16)=4x^3/(x^4-16)
4x^3/(x^4-16)+4x^3/(x^4+16)=4x^3[(x^4+16)+(x^4-16)]/(x^8-16^2)=8x^7/(x^8-256)
原式=8x^7/(x^8-256)
1/(x-2)+1/(x+2)+2x/(x平方+4)+4x三次方/(x四次方+16)
=2x/(x²-4)+2x/(x²+4)+4x³/(x^4+16)
=4x³/(x^4-16)+4x³/(x^4+16)
=8x^7/(x^8-32)
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