A199069 Decimal expansion of x<0 satisfying 2*x^2+2*sin(x)=3.

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

Offset

1,2

Comments

See A198866 for a guide to related sequences. The Mathematica program includes a graph.

Links

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

Example

negative: -1.58112197220741191831288311802822735850...
positive:  0.86107767473955299024198236567037763109430...

Mathematica

a = 2; b = 2; c = 3;
f[x_] := a*x^2 + b*Sin[x]; g[x_] := c
Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, -1.6, -1.5}, WorkingPrecision -> 110]
RealDigits[r](* A199069 *)
r = x /. FindRoot[f[x] == g[x], {x, .86, .87}, WorkingPrecision -> 110]
RealDigits[r] (* A199070 *)

Crossrefs

Cf. A198866.

Sequence in context: A081564 A378506 A199073 * A020797 A199661 A343784

Adjacent sequences: A199066 A199067 A199068 * A199070 A199071 A199072

Keyword

nonn,cons

Author

Clark Kimberling, Nov 02 2011

Status

approved