(a+1)(a+3)(a+5)(a+7)+15
(a+1)(a+3)(a+5)(a+7)+15
因式分解:(a+1)(a+3)(a+5)(a+7)+15 a(a-b+2)-6b(b+1)
分解因式(a+1)(a+3)(a+5)(a+7)+15(2a+b)(4a^2-2ab+b^2)-b(2a-b)^2a^3
1+2a+3a^2+4a^3+5a^4+6a^5+5a^6+4a^7+3a^82a^9+a^10
已知a^2+a+1=0,求1+a+a^2+a^3+a^4+a^5+a^6+a^7+a^8的值
已知1+a+a^2=0求1+a+a^2+a^3+a^4+a^5+a^6+a^7+a^8的值
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)
化简3a×a×a+12a×a-6a-12 a=根号7-1
(a 1)(a 2)(a 3)(a
(a+8)(a-8)-(a+3)(a+5)=1
(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
求(2a平方+3a+2)/(a+1)-(a平方-4a-5)/(a+2)-(3a平方-4a-5)/(a-2)+(2a平方a