login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A198878 Decimal expansion of x>0 satisfying 2*x^2-3*cos(x)=-1. 2
7, 6, 3, 7, 7, 2, 2, 7, 4, 9, 0, 1, 1, 1, 9, 0, 5, 0, 1, 1, 0, 5, 5, 9, 8, 8, 5, 9, 2, 8, 2, 8, 3, 1, 4, 5, 4, 9, 7, 3, 6, 5, 0, 3, 4, 6, 2, 0, 7, 4, 5, 4, 9, 8, 2, 2, 6, 2, 1, 7, 2, 5, 0, 8, 5, 8, 9, 6, 3, 1, 5, 6, 5, 0, 0, 5, 3, 6, 7, 6, 2, 7, 2, 0, 9, 5, 6, 3, 6, 4, 0, 1, 5, 0, 4, 5, 1, 6, 4 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET
0,1
COMMENTS
See A198755 for a guide to related sequences. The Mathematica program includes a graph.
LINKS
EXAMPLE
x=0.76377227490111905011055988592828314549736...
MATHEMATICA
a = 2; b = -3; c = -1;
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, .76, .77}, WorkingPrecision -> 110]
RealDigits[r] (* A198878 *)
CROSSREFS
Cf. A198755.
Sequence in context: A199437 A021571 A013675 * A332982 A335996 A187799
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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)