[(a^2+3)/(a^2-1)]-[(a+1)/(a-1)]+1

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[(a^2+3)/(a^2-1)]-[(a+1)/(a-1)]+1
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[(a^2+3)/(a^2-1)]-[(a+1)/(a-1)]+1
[(a^2+3)/(a^2-1)]-[(a+1)/(a-1)]+1

[(a^2+3)/(a^2-1)]-[(a+1)/(a-1)]+1
解:由题可得:
[(a^2+3)/(a^2-1)]-[(a+1)/(a-1)]+1
=(a^2+3)/(a+1)(a-1) - (a+1)^2/(a+1)(a-1) +(a+1)(a-1)/(a+1)(a-1)
=[a^2+3-(a^2+2a+1)+(a+1)(a-1)]/(a+1)(a-1)
=(a^2+3-a^2-2a-1+a^2-1)/(a+1)(a-1)
=(a^2-2a+1)/(a+1)(a-1)
=(a-1)(a-1)/(a+1)(a-1)
=(a-1)/(a+1)

简单你留著自己做咯……

原式=[(a^2+3)/(a^2-1)]-[(a+1)^2/(a^2-1)]+1
=[(a^2+3-a^2-2a-1)/(a^2-1)]+1
=(-2a+2a)/[(a+1)(a-1)]+1
=[-2(a+1)]/[(a+1)(a-1)]+1
=-2/(a-1)+(a-1)/(a-1)
=(a-3)/(a-1)

(a 1)(a 2)(a 3)(a (a+2)(a+1)-a(a-3) a(a-1)(a-2)(a-3)(a-4)因式分解 【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a－a a=[ ] [4]a－a=a＋a a=[ ] (通分） a/a^a^a+3a+2 ,a/a^a+2a+1 ,-1/3a+6 （a-a/a+1)/(a*a-2a)*(a+1)/(a*a+3a+2)要详细的计算说明！ a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=? 幂的计算题1、a×a^2×a^3×a^4×a^52、a+2a+3a+4a+a×a^2×a^3×a^4 [a^2-4/(a-3)(a+2)+(a+2)/a-3]除以a+1/a-3 [a/(a-1)+a/(a+2)](a+2)/(2a平方+3a+1)化简 (a+1/a方-a+4/1-a方)/a方+2a-3/a+3 求和：1/a+2/a^a+3/a*a*a+...+n/a的n次方 已知a×a+a-1=0求a*a*a+2a+3 a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a 因式分解 a^3+a^2-a-1 (a+1)(a+2)(a-3)计算 1A,2A,3A... 1A,2A,3A...