2+4+6+...+100等于多少?(1/2+1/3+1/4)/(1/2x1/3x1/4)

2+4+6+...+100等于多少?(1/2+1/3+1/4)/(1/2x1/3x1/4)
2+4+6+...+100等于多少?
(1/2+1/3+1/4)/(1/2x1/3x1/4)

2+4+6+...+100等于多少?(1/2+1/3+1/4)/(1/2x1/3x1/4)
(2+100)*(50/2)=2550
(1/3*1/4)+(1/2*1/4)+(1/2*1/3)=3/8

2+4+6+...+100=(2+100)×50/2=102×50/2=51×50=2550

2+98=
4+96=
6+94=
8+92=
10+90=
12+88=
14+86=
16+84=
18+82=
20+80=
///
400+2000+50=2450