(1/50-1)*(1/49-1)*(1/48-1).*(1/3-1)*(1/2-1)
1个回答
(1/50-1)*(1/49-1)*(1/48-1).*(1/3-1)*(1/2-1)
=(-49/50)*(-48/49)*(-47/48).*(-2/3)*(-1/2)
=-1/50
相关问题
1*1/2+1/2*1/3+1/3*1/4+.1/48*1/49+1/49*1/50
(1/50-1)(1/49-1)(1/48-1)…(1/3-1)(1/2-1)
1/1*2*3+1/2*3*4+...+1/(48*49*50)
1+2+3+4+...+48+49+50+49+48+...+4+3+2+1=?
1/2+(1/2+1/3)+(1/4+2/4+3/4)+...+(1/50+2/50+3/50+...+48/50+49
计算(1-1/50)(1-1/49)(1-1/48).(1-1/4)(1-1/3)(1-1/2)=?
计算:(1/50-1)(1/49-1)(1/48-1)…(1/4-1)(1/3-1)(1/2-1)
①(50/1-1)(49/1-1)(48/1-1)...(3/1-1)(2/1-1)=?{注意:50/1是 五十分之一
1/1*1/2*1/3+1/2*1/3*1/4+1/3*1/4*1/5+.+1/48*1/49*1/50
1/2+1/3+2/3+1/4+2/4+3/4...+1/50+2/50+...48/50+49/50=?