a+2a+3a+...+9a+10a+10b+9b+...+3b+2b+b
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a+2a+3a+...+9a+10a+10b+9b+...+3b+2b+b
a+2a+3a+...+9a+10a+10b+9b+...+3b+2b+b
a+2a+3a+...+9a+10a+10b+9b+...+3b+2b+b
a+2a+3a+...+9a+10a+10b+9b+...+3b+2b+b =(1+2+3+…+9+10)a+(10+9+…+3+2+1)b =55a+55b
a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a=
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
合并同类项:a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a+12a+……+2008a+2009a-2010a-2011a
(3a+5)-{9a-[6a+2-(12a-10)+2(a+1)]}
(3a+5)-{9a-[6a+2-(12a-10)+2(a+1)]
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=[ ]
2/9-3a,a-1/a^2-9,a/a^2-6a+9通分
(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=?
a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a.+2008a+2009a-2010a-2011a如何合并同类项?
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
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)
八年级下册数学分式1/(a-1)(a-2)+1/(a-2)(a-3)+1(a-3)(a-4)+.+1(a-9)(a-10)结果是多少
[(a^2-9)/(a^2-6a+9)+(3-a)/(a+3)]×(a-3)/a