1/6+1/12+20/1+...+1/9900

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1/6+1/12+20/1+...+1/9900
x F=Ϙ`%H@`$_.!B;+2 zrL/~V)$q29@*ABϘ4Y"NAOc (nVU

1/6+1/12+20/1+...+1/9900
1/6+1/12+20/1+...+1/9900

1/6+1/12+20/1+...+1/9900
=1/2*3+1/3*4+1/4*5+……+1/99*100
=1/2-1/3+1/3-1/4+1/4-……-1/99+1/99-1/100
=1/2-1/100
=49/100

1/6+1/12+20/1+...+1/9900
=1/(2*3)+1/(3*4)+1/(4*5)+...+1/(99*100)
=1/2-1/3+1/3-1/4+1/4-1/5+...+1/99-1/100
=1/2-1/100
=49/100