计算分式a²/a-1+a+1得( ) A 2a²-1/a-1 B1/1-a C1/a-1 D-2a²+1/a-1
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计算分式a²/a-1+a+1得( ) A 2a²-1/a-1 B1/1-a C1/a-1 D-2a²+1/a-1
计算分式a²/a-1+a+1得( ) A 2a²-1/a-1 B1/1-a C1/a-1 D-2a²+1/a-1
计算分式a²/a-1+a+1得( ) A 2a²-1/a-1 B1/1-a C1/a-1 D-2a²+1/a-1
A 2a²-1/a-1