BesselI(v, z)
Returns the Modified Bessel function of the first kind.

Examples
BesselI(0, 15#i)
-
0.0446874993338022
π
BesselI(1, 14.99)
825079910
2539
BesselI(-1, 15)
1938562039
5908
BesselI(1, 30)
768532038938.9569091796875
BesselI(1/2, x)+BesselK(1/2, x)+BesselY(1/2, x)+BesselJ(1/2, x)
-
2
x
π
cos
(
x
)
+
2
π
x
e
-
x
2
+
2
x
π
sinh
(
x
)
+
2
x
π
sin
(
x
)
BesselI(3, x+1)
-
4
BesselI
(
0
,
x
+
1
)
x
+
1
+
8
BesselI
(
1
,
x
+
1
)
(
x
+
1
)
2
+
BesselI
(
1
,
x
+
1
)
BesselI(3, x)
-
4
BesselI
(
0
,
x
)
x
+
8
BesselI
(
1
,
x
)
x
2
+
BesselI
(
1
,
x
)
Plot([BesselI(0, x), BesselI(1, x), BesselI(2, x), BesselI(3, x)], colors=[red, blue, green, magenta])
-12-8-4048126420-2-4-6

References

Related Functions
A
B
C
D
E
F
G
H
I
J
K
L
M
N
P
Q
R
S
T
V
W
Z