a-2a+3a-4a+.+99a-100a的值为( )
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/25 15:33:21
x)K5J6N5IӶL540H|>iÞ';vӡ~OMR>*lH1i{lFƺ&ڏP#HP%TZ!r@a[]SD1/oy6YOv,[n45 :
{*<آlNt
k0<;/ 6
a-2a+3a-4a+.+99a-100a的值为( )
a-2a+3a-4a+.+99a-100a的值为( )
a-2a+3a-4a+.+99a-100a的值为( )
原式 = a(1-2+3-4+……+99-100) = a(-1-1-……-1)= -50a
说明:两两一组共50组,每组值 = -1 ∴ 有50个-1相加 = -50
a-2a+3a-4a+5a-6a+...+99a-100a
a-2a+3a-4a+5a-6a+7a-8a+9a-10a+11a.+99a-100a=
a=-1 求a-2a+3a-4a+5a-6a+...+99a-100a
化简 a-2a+3a-4a+5a'''''''+99a-100a a=-2 的值
化简a-2a+3a-4a+5a-6a…+99a-100a
当a=1时,a-2a+3a-4a+5a…+99a-100a=
化简多项式a-2a+3a-4a+5a-...+99a-100a用下面方法解决 a-(a+b)+(a+2b)-(a+3b)+...-(a+101b)解法1:a-2a+3a-4a+5a-..+99a-100a =(a+3a+5a+..+99a)+(-2a-4a-6a-...-100a)=2500a-2550a=-50a解法2:a-2a+3a-4a+5a-...+99a-100a=(a-2a)+(3a-4a)+(5a-6a)+..
化简:a-2a+3a-4a+.+99a-100a怎么算
a-2a+3a-4a+.99a-100a=
a-2a+3a-4a+.+99a-100a的值为( )
当A=-3时,A-2A+3A-4A+``````+99A-100A的值是多少?当A=-3时,A-2A+3A-4A+````````````+99A-100A的值是多少?
当a=1时,求a-2a+3a-4a+...+99a-100a的值
计算;(a^3)^4+a^10×a^2-a×a^2-a*a^3*a^8
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)=