(1/50-1)×(1/49-1)×(1/48-1)×...×(1/4-1)×(1/3-1)×(1/2-1) 等于多少,要求完整的过程
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(1/50-1)×(1/49-1)×(1/48-1)×...×(1/4-1)×(1/3-1)×(1/2-1)等于多少,要求完整的过程(1/50-1)×(1/49-1)×(1/48-1)×...×(1/
(1/50-1)×(1/49-1)×(1/48-1)×...×(1/4-1)×(1/3-1)×(1/2-1) 等于多少,要求完整的过程
(1/50-1)×(1/49-1)×(1/48-1)×...×(1/4-1)×(1/3-1)×(1/2-1) 等于多少,要求完整的过程
(1/50-1)×(1/49-1)×(1/48-1)×...×(1/4-1)×(1/3-1)×(1/2-1) 等于多少,要求完整的过程
原式=-(1-1/50)-(1-1/49)……-(1-1/3)-(1-1/2)
=(49/50)(48/49)……(2/3)(1/2)
=(1/50)(1)
=1/50
原式=(-49/50)*(-48/49)*(-47/48)……*(-3/4)*(-2/3)*(-1/2)
=-1/50
(1/50-1)(1/49-1)(1/48-1)…(1/3-1)(1/2-1)
(1/50-1)(1/49-1)(1/48-1).(1/4-1)(1/3-1)
50*50-49*49+48*48.+2*2-1*1
49、50、1、2、3
1+1+2+3+.+49+50=
1/1*2+1/2*3+.+1/49*50
1/1*2+1/2*3+.+1/49*50
(1/50-1)*(1/49-1)*(1/48-1)*.*(1/2-1)
计算:(1/50-1)*(1/49-1)*(1/48-1)*...*(1/4-1)*(1/3-1)*(1/2-1)
计算(50/1-1)(49/1-1)(48/1-1).(4/1-1)(3/1-1)(2/1-1)
1/1*2+1/2*3+……+1/48*49+1/49*50=?
求1/10-1/11+1/11-1/12+……+1/49-50--1/50
(1/50-1)(1/49-1)(1/48-1)…(1/3-1)(1/2-1)=?
(1-1/50)(1-1/49)(1-1/48)…(1-1/4)(1-1/3 省略啦乘号!
1/2+1/3-1/4+.+1/49-1/50)÷(1/26+1/27+.1/50)
(1/50)(1/49)(1/48).(1/4)(1/3)(1/2)这个数学题怎么做?
求|10/1-11/1|+|11/1-12/1|+.+|49/1-50/1|的值
求|1/10-1/11|+|1/11-1/12|+.+|1/49-1/50|的值