由4/(X^2-1)=A/(X-1)+B/(X+1)
得4/(X^2-1)=(AX+A+BX-B)/(X^2-1)
A+B=0
A-B=4
得A=2 B=-2
设X平方减1分之4等于X减1分之A加X加1分之B,则A等于多少,B等于多少
设X平方减1分之4等于X减1分之A加X加1分之B,则A等于多少,B等于多少
数学人气:274 ℃时间:2019-09-29 06:36:42
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