1/a(a+1)+(a+1)(a+2)+1/(a+2)(a+3)+····1/(a+2009)(a+2010)
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1/a(a+1)+(a+1)(a+2)+1/(a+2)(a+3)+····1/(a+2009)(a+2010)
![1/a(a+1)+(a+1)(a+2)+1/(a+2)(a+3)+····1/(a+2009)(a+2010)](/uploads/image/z/15724023-15-3.jpg?t=1%2Fa%28a%2B1%29%2B%28a%2B1%29%28a%2B2%29%2B1%2F%28a%2B2%29%28a%2B3%29%2B%C2%B7%C2%B7%C2%B7%C2%B71%2F%EF%BC%88a%2B2009%29%28a%2B2010%29)
原式可转化为1/a-1/(a+1)+1/(a+1)-1/(a+2).-1/(1+2010)=1/a-1/(1+2010)
(a 1)(a 2)(a 3)(a
求和:1,a+a^2,a^3+a^4+a^5,a^6+a^7+a^8+a^9,···(a不等于0)
·(1-a)(1+a)(a^2+a+1)(a^2-a+1)=______________
a(a-1)(a-2)(a-3)(a-4)因式分解
1/a+1-a+2/a²-1·a²-2a+1/a²+4a+4.
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a
已知实数a满足a²+4a-8=0,求(1/a+1)-(a+3/a²-1)·(a²-2a+1
a·2a·3a·4a·5a·(a+2a+3a+4a+5a),其中a的3次方=3分之1
a/a-1÷(a-a/2a-1)
(a+1)(a+2)(a-3)计算
1A,2A,3A...
已知a是实数,且a^3+a^2+a+1=0,则a^2007+a^2008+a^2009+a^2010+a^2011的值是