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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A199071 Decimal expansion of x<0 satisfying 2*x^2+3*sin(x)=1. 3
1, 4, 0, 7, 1, 0, 6, 6, 3, 9, 7, 6, 3, 0, 3, 9, 9, 0, 5, 9, 9, 6, 1, 6, 6, 8, 8, 9, 0, 3, 5, 9, 5, 7, 1, 2, 8, 5, 0, 8, 7, 2, 6, 3, 1, 0, 5, 4, 0, 1, 0, 4, 5, 4, 1, 3, 6, 1, 7, 6, 9, 4, 2, 3, 1, 7, 2, 2, 7, 3, 2, 3, 1, 9, 6, 9, 6, 4, 2, 7, 3, 6, 7, 4, 7, 2, 9, 1, 3, 6, 5, 2, 1, 3, 2, 7, 1, 6, 5 (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: -1.40710663976303990599616688903595712850...

positive:  0.28352555144412274861845117327862135032...

MATHEMATICA

a = 2; b = 3; c = 1;

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, -1.5, -1.4}, WorkingPrecision -> 110]

RealDigits[r] (* A199071 *)

r = x /. FindRoot[f[x] == g[x], {x, .28, .29}, WorkingPrecision -> 110]

RealDigits[r] (* A199072 *)

CROSSREFS

Cf. A198866.

Sequence in context: A223052 A027857 A052400 * A157698 A251967 A330725

Adjacent sequences:  A199068 A199069 A199070 * A199072 A199073 A199074

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 February 27 15:59 EST 2020. Contains 332307 sequences. (Running on oeis4.)