-3,5,7,4,14,18,() A.29 B.23 C.21 D.17
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![-3,5,7,4,14,18,() A.29 B.23 C.21 D.17](/uploads/image/z/2626656-24-6.jpg?t=-3%2C5%2C7%2C4%2C14%2C18%2C%28%29+A.29+B.23+C.21+D.17)
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-3,5,7,4,14,18,() A.29 B.23 C.21 D.17
-3,5,7,4,14,18,() A.29 B.23 C.21 D.17
-3,5,7,4,14,18,() A.29 B.23 C.21 D.17
29
a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a=
合并同类项:a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a+12a+……+2008a+2009a-2010a-2011a
化简a+2a-3a-4q+5a+6a-7a-8a+...2001a+2002a-2003a-2004a
-[-7a平方-5a+(2a平方-3a)+2a]-4a平方. 很急啊.
a-2a-3a+4a+5a-6a-7a+8a+9a-10a-11a.+2008a+2009a-2010a-2011a如何合并同类项?
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
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)
已知1+a+a^2=0求1+a+a^2+a^3+a^4+a^5+a^6+a^7+a^8的值在线等
化简(—a^3+3a^2-7a+5)+(5a^-6a)-(a^3-4a+7)
化简(—a^3+3a^2-7a+5)+(5a^-6a)-(a^3-4a+7)
计算(-3a^2)^3*a^3+(-4a)^2*a^7-(5a^3)^3
计算,(-3a^3)^2*a^3+(-4a)^2*a^7-(5a^3)^3
a-2a+3a-4a+5a-6a+...+99a-100a
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
(a+3a+5a+...+2009a)-(2a+4a+6a+...+2008a)=
(a+3a+5a+.+2009a)-(2a+4a+6a+.2008a)
计算(a+3a+5a+...+2009a)-(2a+4a+6a+...+2010a)
(a+3a+5a+...+2013a)-(2a+4a+6a+...+2012a)=