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=BESSELK()
Returns the modified Bessel function, which is equivalent to the Bessel functions evaluated for purely imaginary arguments.
Applies To:
Excel for Microsoft 365Excel for Microsoft 365 for MacExcel 2024Excel 2024 for MacExcel 2021Excel 2021 for MacExcel 2019Excel 2016
=BESSELK(X, N)
Hover argument names in the table for details.
Output typeNumber/Text
Popularity43 / 100
VolatileNo
Dynamic ArrayNo
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◧ Arguments
| Argument | Type | Required | Description |
|---|---|---|---|
x |
Number | Required | The value at which to evaluate the function. |
n |
Number | Required | The order of the function. If n is not an integer, it is truncated. |
▣ Examples
تابع بسل اصلاحشده در ۱٫۵ با مرتبه ۱.
=BESSELK(1.5, 1)
✦ Tips
- The n-th order modified Bessel function of the variable x is: where Jn and Yn are the J and Y Bessel functions, respectively.
⚠ Common Errors
#VALUE!
If x is nonnumeric, BESSELK returns the #VALUE! error value. If n is nonnumeric, BESSELK returns the #VALUE! error value.
Fix: مطمئن شوید هر دو آرگومان عددی هستند و ارجاعها خالی یا متنی نیستند.
#NUM!
If n < 0, BESSELK returns the #NUM! error value.
Fix: x>0 and n ≥0
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