=BESSELI(x,n)
=BESSELI(1.5, 1)
The BESSELI function is used to calculate the modified Bessel function of the first kind. It takes two arguments: the x value and the order. For example, the formula calculates the modified Bessel function of 1.5 with an order of 1.
The BESSELI function calculates a modified Bessel function with purely imaginary arguments. It returns errors if either x or n is not a number, or if n is negative.