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	Spreadsheet Mathematical Functions Function Wizard Functions

BESSELI

Description: Returns the modified Bessel function ln(x), which is equivalent to the Bessel function evaluated for purely imaginary arguments.

Syntax: BESSELI(Number, Order)

• Number is the value at which to evaluate the function.

• Order is the order of the Bessel function.

Remarks:

• Number must be numeric.

• Order must be numeric.

• Order must be >= 0 and an integer.

• The n-th order modified Bessel function of the variable x is:

Example:

• Compute the modified Bessel function at x = 1.5 with an order of n = 1.

BESSELI(1.5, 1) = 0.981666

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