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Bessel Y1 Function
Math Engineering Class

Public Function BesselY1( _
    ByVal vX As Variant _
    ) As Variant

Compute the Bessel function of the second kind of order one.

Examples: 
    BesselY1(0.1) = -6.45895109470202
    BesselY1(0.5) = -1.47147239267024
    BesselY1(5.0) = 0.147863143391226
    BesselY1(5.0) = BesselY(5.0, 1)
See also: 
    BesselY0 Function
    BesselY Function
    BesselJ1 Function
    DBESY1 Function
vX: Function returns Null if vX is Null or cannot be fixed up to a Double precision floating point number.

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