login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198926 Decimal expansion of x>0 satisfying 3*x^2-cos(x)=4. 2
1, 2, 0, 5, 1, 9, 8, 1, 8, 1, 7, 7, 5, 4, 6, 5, 2, 5, 7, 6, 8, 6, 1, 0, 3, 9, 7, 5, 4, 9, 5, 2, 8, 2, 7, 6, 5, 0, 4, 3, 3, 1, 4, 1, 5, 9, 2, 2, 6, 4, 2, 8, 1, 2, 4, 9, 8, 7, 7, 2, 4, 5, 2, 0, 9, 9, 6, 1, 1, 6, 4, 4, 4, 5, 0, 5, 4, 7, 3, 6, 0, 3, 5, 7, 4, 7, 0, 7, 5, 5, 3, 0, 2, 7, 7, 1, 8, 1, 9 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

See A198755 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

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

EXAMPLE

x=1.20519818177546525768610397549528276504331...

MATHEMATICA

a = 3; b = -1; c = 4;

f[x_] := a*x^2 + b*Cos[x]; g[x_] := c

Plot[{f[x], g[x]}, {x, -2, 2}, {AxesOrigin -> {0, 0}}]

r = x /. FindRoot[f[x] == g[x], {x, 1.2, 1.3}, WorkingPrecision -> 110]

RealDigits[r]  (* A198926 *)

CROSSREFS

Cf. A198755.

Sequence in context: A177267 A188445 A246723 * A243998 A082974 A167635

Adjacent sequences:  A198923 A198924 A198925 * A198927 A198928 A198929

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Oct 31 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified December 10 21:23 EST 2016. Contains 279011 sequences.