计算. (1/50-1)×(1/49-1)×(1/48-1)×```×(1/3-1)×(1/2-1)
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/11 11:40:10
计算. (1/50-1)×(1/49-1)×(1/48-1)×```×(1/3-1)×(1/2-1)
计算.五十分之一减一的差乘以四十九分之一减一的差乘以四十八分之一减一的差乘以```乘以三分之一减一的差乘以二分之一减一
计算.五十分之一减一的差乘以四十九分之一减一的差乘以四十八分之一减一的差乘以```乘以三分之一减一的差乘以二分之一减一
(1/50-1)(1/49-1)(1/48-1).(1/4-1)(1/3-1)(1/2-1)
= (-1)^49 * (1-1/50)(1-1/49)...(1-1/2)
= (-1) * (49/50)(48/49)...(2/3)(1/2)
= (-1) * (49*48*.*2*1)/(50*49*48*.*3*2)
= (-1) * (1)/(50)
= -1/50
= (-1)^49 * (1-1/50)(1-1/49)...(1-1/2)
= (-1) * (49/50)(48/49)...(2/3)(1/2)
= (-1) * (49*48*.*2*1)/(50*49*48*.*3*2)
= (-1) * (1)/(50)
= -1/50