A198877 Decimal expansion of x>0 satisfying 2*x^2-3*cos(x)=-2.

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

Offset

0,1

Comments

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

Links

Table of n, a(n) for n=0..98.

Example

x=0.537272474772124645372051508512530242286...

Mathematica

a = 2; b = -3; c = -2;
f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, .53, .54}, WorkingPrecision -> 110]
RealDigits[r] (* A198877 *)

Crossrefs

Cf. A198755.

Sequence in context: A099217 A023103 A153454 * A201752 A117126 A048997

Adjacent sequences: A198874 A198875 A198876 * A198878 A198879 A198880

Keyword

nonn,cons

Author

Clark Kimberling, Oct 31 2011

Status

approved