1+(-2)+3+(-4)+.+2003+(-2004)| 1-1/2 | + | 1/2-1/3 | + | 1/3-1/4 | +.+ | 1/9-1/10 |
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/28 03:43:39
1+(-2)+3+(-4)+.+2003+(-2004)| 1-1/2 | + | 1/2-1/3 | + | 1/3-1/4 | +.+ | 1/9-1/10 |
1+(-2)+3+(-4)+.+2003+(-2004)
| 1-1/2 | + | 1/2-1/3 | + | 1/3-1/4 | +.+ | 1/9-1/10 |
1+(-2)+3+(-4)+.+2003+(-2004)| 1-1/2 | + | 1/2-1/3 | + | 1/3-1/4 | +.+ | 1/9-1/10 |
1+(-2)+3+(-4)+.+2003+(-2004)
= (1 - 2) + (3 - 4) + ...+ (2003 - 2004)
= (-1)× 1002
= -1002
| 1-1/2 | + | 1/2-1/3 | + | 1/3-1/4 | +.+ | 1/9-1/10 |
= 1 - 1/2 + 1/2 - 1/3 + 1/3 - 1/4 + ...+ 1/9 - 1/10
= 1 - 1/10
= 9/10
-1002
9/10
1.1+(-2)+3+(-4)+......+2003+(-2004)
=[1+(-2)]+[3+(-4)]+......+[2003+(-2004)
=-1-1-......-1
=-2004/2
=-1002
2.| 1-1/2 | + | 1/2-1/3 | + | 1/3-1/4 | +......+ | 1/9-1/10 | =1-1/2 +1/2-1/3+1/3-1/4+......+1/9-1/10=1-1/10=9/10
1+(-2)+3+(-4)+.+2003+(-2004)
(-1)+(+2)+(-3)+(+4)+...(-2001)+(+2002)+(-2003)+(+2004)
(1-2)*(2-3)*(3-4)*(4-5)*…*(2002-2003)*(2003-2004)=?*是乘号
计算:1+(-2)+3(-4)+5+(-6)+…+2003+(-2004)
(1-2)(2-3)(3-4)(4-5)····(2003-2004) 咋算
(-2)^2003*0.125^2003*4^2004
(-1)+(+2)+(-3)+(+4)+...(-2001)+(+2002)+(-2003)+(+2004)=?
(-1)+(+2)+(-3)+(+4)+…(-2001)+(+2002)+(-2003)+(+2014)怎么写
(-1)+(+2)+(-3)+(+4)…(+2001)+(+2002)+(-2003)+(+2004).
(-1)+(+2)+(-3)+(+4)+.+(-2003)+(+2004) 怎么算啊算理是甚么
(1+1/2+1/3+…+1/2002)*(1/2+1/3+1/4+…+1/2003)-(1/2+1/3+1/4+…+1/2002)*(1+1/2+1/3+…+1/2003)
1+(-2)+(-3)+4+5+(-6)+(-7)+8+……+2001+(-2002)+(-2003)+2004
1+(-2)+3+(-4)+.+2003+(-2004)| 1-1/2 | + | 1/2-1/3 | + | 1/3-1/4 | +.+ | 1/9-1/10 |
计算(1+3+5+.+2001+2003+2005)-(2+4+6+.+2000+2002+2004)
(1+3+5+.2003+2005)-(2+4+6+.2002+2004)
(1+3+5+……+2003)-(2+4+6+……+2004)=
计算(1+3+5+...+2001+2003+2005)-(2+4+6+...+2000+2002+2004)
-99又24分之23*18-1^4-(1-0.5)*3分之1*(2-(-3)^2) (-0.25)^2003*(-4)^2004*(-1)^2007