数学题1/1*3+1/3*5+1/5*7+....1/97*99+1/99*101=?谢谢!

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/27 22:53:48
数学题1/1*3+1/3*5+1/5*7+....1/97*99+1/99*101=?谢谢!
x){6uӵ^.aoemoe $M̵#C}Ks-KK=s_lXD6IE0FΆj130f@0Y0D$A]a`7 [ZOd+ƞga2:C#OHDkdR`B9ANP(H܃DI

数学题1/1*3+1/3*5+1/5*7+....1/97*99+1/99*101=?谢谢!
数学题1/1*3+1/3*5+1/5*7+....1/97*99+1/99*101=?谢谢!

数学题1/1*3+1/3*5+1/5*7+....1/97*99+1/99*101=?谢谢!
0.5(1-1/3+1/3-1/5+1/5.-1/101)=0.5(1-1/101)=50/101

0.5(1-1/3+1/3-1/5+1/5............-1/101)=0.5(1-1/101)=50/101

0.5(1-1/3+1/3-1/5+1/5............-1/101)=0.5(1-1/101)=50/101
就是这样

50/101

0.5(1-1/3+1/3-1/5+1/5............-1/101)=0.5(1-1/101)=50/101
0.5(1-1/3+1/3-1/5+1/5............-1/101)=0.5(1-1/101)=50/101
0.5(1-1/3+1/3-1/5+1/5............-1/101)=0.5(1-1/101)=50/101
就是这样!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

灌水~

1/n-1/(n+2)=1/(n*(n+2))
所以题=0.5(1-1/3+1/3-1/5......+1/99-1/101)
=0.5*(1-1/101)
=50/101