Dim x, n, i, res
x = Val(InputBox("輸入數據x")): n = Val(InputBox("輸入數據n"))
For i = 2 To n
res = res + x ^ (i - 1) / jc(i)
Next i
MsgBox res
End Sub
Function jc(m)
Dim j, tem
tem = 1
For j = 1 To m
tem = tem * j
Next j
jc = tem
End Function