我要算一个3年的增长率，原始公式是 PE croissance = (PE ratio / PE moyenne -1)^(1/3)

每次一运行就显示wsPEtx.Cells(i + 2, j + 1).Value = (wsPE.Cells(i + 2, j + 1).Value / wsPEm.Cells(i + 2, j + 1).Value - 1)^ (1 / 3)是无效的过程调用或参数
如果把^ (1 / 3)去掉，或者换成^ 2， 程序就可以运行
数据里面含有负数，但是负数也是可以开三次方根号的呀
实在不知道哪里出问题了，麻烦大家帮我看看
谢谢了！
这是我写的code

Option Explicit
Option Base 1
Sub CalTaux()


Dim wsPE As Worksheet, wsPEm, wsPEtx As Worksheet

Dim L As Integer, C As Integer, i As Integer, j As Integer



Set wsPE = ThisWorkbook.Worksheets("PE ratio")
Set wsPEm = ThisWorkbook.Worksheets("PE moyenne")
Set wsPEtx = ThisWorkbook.Worksheets("PE croissance")

For j = 1 To 10

For i = 1 To 10


  If wsPEm.Cells(i + 2, j + 1).Value = 0 Then
  wsPEtx.Cells(i + 2, j + 1).Value = 0
  Else: wsPEtx.Cells(i + 2, j + 1).Value = (wsPE.Cells(i + 2, j + 1).Value / wsPEm.Cells(i + 2, j + 1).Value - 1) ^ (1 / 3)
  End If


  Next i

Next j

End Sub