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A198837
Decimal expansion of x>0 satisfying 2*x^2+cos(x)=4.
2
1, 3, 8, 0, 3, 4, 3, 5, 1, 9, 9, 5, 5, 4, 3, 1, 1, 4, 4, 2, 0, 6, 9, 4, 9, 1, 5, 7, 5, 5, 6, 8, 8, 1, 5, 5, 7, 1, 5, 5, 6, 4, 6, 4, 6, 9, 7, 8, 5, 3, 6, 8, 3, 2, 8, 5, 5, 3, 7, 1, 2, 9, 3, 9, 9, 6, 5, 2, 9, 7, 9, 7, 3, 9, 9, 1, 0, 4, 3, 4, 5, 9, 1, 3, 8, 5, 1, 7, 4, 0, 7, 2, 4, 5, 9, 2, 4, 8, 0
OFFSET
1,2
COMMENTS
See A198755 for a guide to related sequences. The Mathematica program includes a graph.
EXAMPLE
x=1.3803435199554311442069491575568815571556...
MATHEMATICA
a = 2; 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, 1.3, 1.4}, WorkingPrecision -> 110]
RealDigits[r] (* A198837 *)
CROSSREFS
Cf. A198755.
Sequence in context: A199731 A010626 A370413 * A257530 A196609 A070063
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Oct 31 2011
STATUS
approved