A198611 Decimal expansion of -x, where x < 0 satisfies 2*x^2+4*x = sin(x).

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

Offset

1,2

Comments

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

Links

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

Example

-1.71054521091808440187340377301440319765795101...

Mathematica

a = 2; b = 4; c = 1;
f[x_] := a*x^2 + b*x; g[x_] := c*Sin[x]
Plot[{f[x], g[x]}, {x, -2, 1}]
r = x /. FindRoot[f[x] == g[x], {x, -1.72, -1.71}, WorkingPrecision -> 110]
RealDigits[r] (* A198611 *)

Crossrefs

Cf. A198414.

Sequence in context: A240907 A179376 A152447 * A298853 A351213 A198212

Adjacent sequences: A198608 A198609 A198610 * A198612 A198613 A198614

Keyword

nonn,cons

Author

Clark Kimberling, Oct 27 2011

Extensions

a(83) onwards corrected by Georg Fischer, Aug 01 2021

Status

approved