(1+2/5)*(1-2/5)*(1+2/7)*(1-2/7)*.*(1+2/2005)*(1-2/2005) 简便计算
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/20 00:50:31
xQ
0\
R.0 `0A|xv
!ZEϱ)W}H'MzG,x*xdJޥѣ/guzT֬8<2IBDmv'nBڣQGuc5Rc 6'¼q,TLܕM!b| Af
2&4p5LtnH*UNzq_{%2Vޑm
-2,-1,2,5,( )
5,2,1,1,
计算:(5+1)(5^2+1)(5^4+1)...(5^256+1)+1
1、1、2、3、5、( )、( ).
5-2=()+1
1 ,2 ,5 ,29 ,)
1-3/5+1/2-2/5
( ) 比2/5米多1/5
(5y+1)(5y^2-5y+1)-5(1+2y)(1-2y)
[(0.75+5/1)÷0.25+5/2]×2/5
1+5+5+5+5+3+2+2+2+2+2+2+1+2+5
1+2+5+51+2+5+5
1/2 1/2 1/2 2/5 5/16 ()数字推理说明为什么啊
1.(1+1/2+1/3+1/4)*(1/2+1/3+1/4+1/5)-(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4)=2.(1+1/2+1/3+1/4+1/5)*(1/2+1/3+1/4+1/5+1/6)-(1+1/2+1/3+1/4+1/5+1/6)*(1/2+1/3+1/4+1/5)=
1/1*3=1/2(1-1/3)1/3*5=1/2(1/3-1/5)1/5*7=1/2(1/5-1/7).1/17*19=1/2(1/17-1/19)所以1/1*3+1/3*5+1/5*7+.1/17*19=1/2(1-1/3)+1/2(1/3+1/5)+1/2(1/5-1/7)+.1/2(1/17-1/19)=1/2(1-1/3+1/3-1/5+1/5-1/7+1/7.+1/17-1/19)=1/2(1-1/1
简便计算:(1+2/3)×(1-2/3)×(1+2/5)×(1-2/5)×.×(1+2/99)×(1-2/99)
(1+2/3)×(1- 2/3)×(1+2/5)×(1- 2/5)×...×(1+2/99)×(1- 2/99)=?
(-1 2/3)乘1/5-|-5/6|除以(+ 2 1/2)等于多少?