Question

VB编写程序,计算并输出下面级数前n项中(n＝50)奇数项的和.1*2*3+2*3*4+3*4*5+……+n*(n+1)

Answer 1

Private Sub Command1_Click()

Dim i As Long,sum As Long

For i = 1 To 50 Step 2

sum = sum + i * (i + 1) * (i + 2)

Next

MsgBox "级数前50项奇数项和为：" & sum

End Su