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A198931 Decimal expansion of x>0 satisfying 3*x^2-2*cos(x)=4. 2
1, 2, 4, 3, 9, 3, 7, 2, 8, 5, 3, 9, 7, 2, 3, 6, 5, 5, 2, 7, 3, 1, 0, 1, 5, 8, 7, 7, 5, 2, 0, 5, 7, 2, 2, 0, 1, 5, 4, 5, 8, 8, 8, 2, 7, 1, 2, 2, 5, 1, 0, 8, 3, 3, 3, 5, 6, 6, 5, 6, 5, 3, 1, 9, 9, 4, 7, 9, 7, 5, 1, 7, 2, 1, 9, 0, 1, 6, 1, 7, 1, 3, 5, 2, 5, 3, 5, 1, 5, 1, 8, 7, 1, 6, 7, 1, 4, 9, 6 (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
EXAMPLE
x=1.243937285397236552731015877520572201545888...
MATHEMATICA
a = 3; b = -2; 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] (* A198931 *)
CROSSREFS
Cf. A198755.
Sequence in context: A272471 A367443 A155749 * A344425 A340896 A293779
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Oct 31 2011
STATUS
approved

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)