login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A199069 Decimal expansion of x<0 satisfying 2*x^2+2*sin(x)=3. 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 (list; constant; graph; refs; listen; history; text; internal format)
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: A335928 A081564 A199073 * A020797 A199661 A343784

Adjacent sequences:  A199066 A199067 A199068 * A199070 A199071 A199072

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 02 2011

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 1 14:10 EST 2021. Contains 349430 sequences. (Running on oeis4.)