A198758 Decimal expansion of x>0 satisfying x^2+2*cos(x)=3.

1, 9, 1, 8, 9, 2, 7, 8, 1, 6, 3, 3, 5, 2, 4, 4, 2, 9, 7, 2, 0, 4, 4, 7, 6, 8, 9, 0, 0, 4, 0, 2, 8, 3, 7, 0, 1, 3, 5, 4, 5, 6, 7, 7, 7, 3, 7, 9, 5, 4, 2, 6, 8, 9, 5, 0, 9, 7, 4, 0, 7, 7, 0, 7, 4, 9, 6, 0, 4, 7, 6, 7, 4, 1, 4, 5, 7, 8, 9, 0, 6, 7, 6, 8, 4, 6, 0, 3, 0, 3, 8, 8, 1, 4, 2, 9, 4, 3, 2

Offset

1,2

Comments

See A198755 for a guide to related sequences. The Mathematica program includes a graph.

Links

Table of n, a(n) for n=1..99.

Example

x=1.918927816335244297204476890040283701354...

Mathematica

a = 1; b = 2; c = 3;
f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
Plot[{f[x], g[x]}, {x, -3, 3}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, 1.9, 2.0}, WorkingPrecision -> 110]
RealDigits[r]    (* A198758 *)

Crossrefs

Cf. A198755.

Sequence in context: A340551 A299622 A163899 * A075700 A021843 A362752

Adjacent sequences: A198755 A198756 A198757 * A198759 A198760 A198761

Keyword

nonn,cons

Author

Clark Kimberling, Oct 30 2011

Status

approved