1*2+2*3+……+100*101=?1*2+2*3+3*4+……+n*(n+1)=?1*2*3+2*3*4+……+n(n+1)(n+2)=?
问题描述:
1*2+2*3+……+100*101=?1*2+2*3+3*4+……+n*(n+1)=?1*2*3+2*3*4+……+n(n+1)(n+2)=?
1*2+2*3+……+100*101=?
1*2+2*3+3*4+……+n*(n+1)=?
1*2*3+2*3*4+……+n(n+1)(n+2)=?
答
5423,45641