BESSELI

Definition: BESSELI is a function that returns the modified Bessel function of the first kind for a complex number.

Syntax: =BESSELI(x, n)

Situation: This formula is suitable when you need to calculate the modified Bessel function of the first kind for a complex number.

Example: If you have a complex number 4+3i, the modified Bessel function of the first kind can be found using the formula =BESSELI(4+3i, 2), which returns a value of 9.1301-3.7648i.