把f=x/(x^2-5x+6)按(x-5)展开,

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把f=x/(x^2-5x+6)按(x-5)展开,
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把f=x/(x^2-5x+6)按(x-5)展开,
把f=x/(x^2-5x+6)按(x-5)展开,


把f=x/(x^2-5x+6)按(x-5)展开,
f(x) = 3/[(x-5)+2] - 2/[(x-5)+3]
= (3/2) / [ 1+ (x-5)/2 ] - (2/3) / [ 1 + (x-5)/3 ]
基本公式1/(1+x) = 1-x+x^2-x^3+……,-1

f=((x-5)+5)/((x-5)^2+5(x-5)+6)

数学基础呀!神!!!!!!!

(x-2)(x-3)