18、a+1/a=3,则a^2+1/a^2=______; (a-1/a)^2=______.18、a+1/a=3,则a^2+1/a^2=______;(a-1/a)^2=______.
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18、a+1/a=3,则a^2+1/a^2=______;(a-1/a)^2=______.18、a+1/a=3,则a^2+1/a^2=______;(a-1/a)^2=______.18、a+1/a
18、a+1/a=3,则a^2+1/a^2=______; (a-1/a)^2=______.18、a+1/a=3,则a^2+1/a^2=______;(a-1/a)^2=______.
18、a+1/a=3,则a^2+1/a^2=______; (a-1/a)^2=______.
18、a+1/a=3,则a^2+1/a^2=______;
(a-1/a)^2=______.
18、a+1/a=3,则a^2+1/a^2=______; (a-1/a)^2=______.18、a+1/a=3,则a^2+1/a^2=______;(a-1/a)^2=______.
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a a=[ ]
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7.+a+2013+a+2014=?
18、a+1/a=3,则a^2+1/a^2=______; (a-1/a)^2=______.18、a+1/a=3,则a^2+1/a^2=______;(a-1/a)^2=______.
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
已知A=a+a^1+a^2+a^3+...+a^2012,若a=1,则A=____________;若a=-1,则A=______________.
已知a×a+a-1=0求a*a*a+2a+3
A=a+a^1+a^2+a^3+...+a^2008,若a等于1,则A等于【 】;若a=-1,则A=[
a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a
若a*a+3a-1=0,则a*a*a+5a*a+5a+18=?可将平方立方写成简写
已知A=a+a^2+a^3+…+a^2013,若a=1,则A等于多少?若a=-1,则A等于多少?
2a(a-2)-(a+1)(a-3)=?
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
已知a+a/1=3 则 a^2+1+a^4/a^2
3a(2a-5)+2a(1-3a)=26则A等于多少
若a²-a+1=0,则2a³-a²+a+3=?
a^2+a+1=0,则a^2000+a^1998+a^1996+3=kuai
a+a^2+a^3+a^4+a^5+a^6...+a^n=a^n+1-a/a-1 (a-1)≠0