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A198817
Decimal expansion of x>0 satisfying x^2-cos(x)=2.
2
1, 4, 5, 4, 6, 1, 8, 9, 2, 9, 2, 0, 8, 1, 1, 1, 2, 7, 8, 7, 9, 5, 8, 4, 2, 2, 2, 3, 3, 7, 8, 0, 9, 3, 2, 9, 1, 0, 4, 3, 2, 4, 7, 9, 6, 7, 5, 8, 6, 4, 2, 5, 8, 2, 7, 5, 9, 7, 3, 1, 8, 4, 8, 7, 1, 9, 5, 3, 9, 1, 2, 9, 9, 6, 9, 4, 2, 5, 4, 2, 9, 8, 5, 1, 4, 6, 0, 4, 8, 1, 3, 4, 3, 9, 9, 0, 8, 1, 6
OFFSET
1,2
COMMENTS
See A198755 for a guide to related sequences. The Mathematica program includes a graph.
EXAMPLE
x=1.45461892920811127879584222337809329104324...
MATHEMATICA
a = 1; b = -1; c = 2;
f[x_] := a*x^2 + b*Cos[x]; g[x_] := c
Plot[{f[x], g[x]}, {x, -3, 3}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]
RealDigits[r] (* A198817 *)
CROSSREFS
Cf. A198755.
Sequence in context: A265300 A223170 A303275 * A248624 A363195 A085428
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Oct 30 2011
STATUS
approved