1/1×1/2×1/3+1/2×1/3×1/4+1/3×1/4×1/5+...+1/48×1/49×1/50
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/06 10:45:50
1/1×1/2×1/3+1/2×1/3×1/4+1/3×1/4×1/5+...+1/48×1/49×1/50
=1/1×2×3+1/2×3×4+……+1/48×49×50
=1/2×(1/1×2-1/2×3+1/2×3-1/3×4+……+1/48×49-1/49×50)
=1/2×(1/1×2-1/49×50)
=306/1225
=1/2×(1/1×2-1/2×3+1/2×3-1/3×4+……+1/48×49-1/49×50)
=1/2×(1/1×2-1/49×50)
=306/1225
计算(50/1-1)(49/1-1)(48/1-1).(4/1-1)(3/1-1)(2/1-1)
1/1×1/2×1/3+1/2×1/3×1/4+1/3×1/4×1/5+...+1/48×1/49×1/50
(1/50)(1/49)(1/48).(1/4)(1/3)(1/2)这个数学题怎么做?
计算(50/1)(49/1)(48/1)…(4/1)(3/1)(2/1)的值
1/2*3+1/3*4+1/4*5……+1/48*49+1/49*50是多少
计算1/1*2*3+1/2*3*4+1/3*4*5+.+1/48*49*50
1/1*2*3+1/2*3*4+1/3*4*5~1/48*49*50=?
计算 (50/1-1)(49/1-1)(48/1-1)...(4/1-1)(3/1-1)(2/1-1)
计算 (50/1-1)(49/1-1)(48/1-1)...(4/1-1) (3/1-1)(2/1-1)
(1/50-1)(1/49-1)(1/48-1)…(1/4-1)(1/3-1)(1/2-1)[等于多
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)