A198539 Decimal expansion of x<0 having 4*x^2+2x=sin(x).

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

Offset

0,1

Comments

See A198414 for a guide to related sequences. The Mathematica program includes a graph.

Links

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

Example

x=-0.252651217363067969849947891467001...

Mathematica

a = 4; b = 2; c = 1;
f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
Plot[{f[x], g[x]}, {x, -.6, .2}]
r = x /. FindRoot[f[x] == g[x], {x, -.26, -.25}, WorkingPrecision -> 110]
RealDigits[r] (* A198539 *)

Crossrefs

Cf. A198414.

Sequence in context: A309714 A309431 A344077 * A121311 A242403 A179015

Adjacent sequences: A198536 A198537 A198538 * A198540 A198541 A198542

Keyword

nonn,cons

Author

Clark Kimberling, Oct 26 2011

Status

approved