计算:a²/a-1-a-1(过程)
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计算:a²/a-1-a-1(过程)
计算:a²/a-1-a-1(过程)
计算:a²/a-1-a-1(过程)
a²/(a-1)- (a-1)
=a²/(a-1) - (a-1)²/(a-1)
=(a²-a²+2a-1)/(a-1)
=(2a-1)/(a-1)
原式=a^2/a-1-(a-1)^2/a-1=a^2-a^2+2a-1/a-1=2a-1/a-1
a²/(a-1)- (a-1)
=a²/(a-1) - (a-1)²/(a-1)
=(a²-a²+2a-1)/(a-1)
=(2a-1)/(a-1)