我来给你解决
原式=1/(X+1) - 【(X+3)/(X²-1)】*(X-1)²/(X²+4X+3)
=1/(X+1) - 【(X+3)/(X²-1)】*(X-1)²/【(X+1)(X+3)】
=1/(X+1) - (X-1)/(X+1)
=X/(X+1)
本题是一个化简题为了表示清楚所加的括号要看清楚.
我来给你解决
原式=1/(X+1) - 【(X+3)/(X²-1)】*(X-1)²/(X²+4X+3)
=1/(X+1) - 【(X+3)/(X²-1)】*(X-1)²/【(X+1)(X+3)】
=1/(X+1) - (X-1)/(X+1)
=X/(X+1)
本题是一个化简题为了表示清楚所加的括号要看清楚.