10(2a+1)+a-(10a+2a+1)=36
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a
(a 1)(a 2)(a 3)(a
若a^2-10a+1=0,求a^2+1/a^2和(a-1/a)^2
1+2a+3a^2+4a^3+5a^4+6a^5+5a^6+4a^7+3a^82a^9+a^10
36-a^2/a^2+10a+25÷6-a/2a+10×a-5/a^2+6a其中a=根号2
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
1+a^1+a^2+a^3+.+a^n=?
{1,a,b/a}={0,a^2,a+b}
(高一集合)已知A={2,4,a*a*a-2a*a-a+7},B={1,a+3,a*a-2a+2,a*a*a+a*a+3
c语言编程求1A+2A+3A+4A.+10A
先化简,再求值:(a-1/a-a-2/a+1)÷2a^2-a/a^+2a+1,其中a满足a^2-a-1=0
先化简后,再求值:(a-2/a*a+2a-a-1/a*a+4a+4)/a-4/a+2其中a=根号2-1