BESSELI(x, n)

Returns the Bessel function evaluated for purely imaginary arguments.

xThe value at which to evaluate the function.
nThe order of the function.

Remarks

* If any of the arguments are not numeric, then #VALUE! is returned.
* If "n" is not an integer, it is truncated.
* If "n" < 0, then #NUM! is returned.
* In Excel 2007 the accuracy of this function was improved.
* In Excel 2003 this function was only available when you had the Analysis ToolPak add-in loaded.
* For the Microsoft documentation refer to support.office.com

 A
1=BESSELI(1,1) = 0.565
2=BESSELI(1,2) = 0.136
3=BESSELI(2,1) = 1.591
4=BESSELI(2,2) = 0.689
5=BESSELI(1.5,1) = 0.982
6=BESSELI(1.5,1.9) = 0.982
7=BESSELI(-1.5,1) = -0.982
8=BESSELI(1.5,-1) = #NUM!
9=BESSELI("some text",1) = #VALUE!
10=BESSELI(1.5,"some text") = #VALUE!


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