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A198990 Decimal expansion of x>0 satisfying 4*x^2-cos(x)=4. 2
1, 0, 5, 9, 4, 0, 8, 7, 6, 9, 0, 7, 0, 0, 3, 7, 4, 7, 8, 4, 5, 4, 1, 9, 3, 2, 2, 5, 6, 9, 2, 3, 6, 5, 3, 2, 5, 0, 6, 7, 9, 6, 1, 1, 7, 9, 2, 4, 6, 0, 8, 4, 1, 1, 2, 7, 4, 3, 5, 1, 3, 4, 5, 1, 3, 2, 9, 8, 1, 2, 6, 1, 3, 0, 5, 6, 8, 6, 3, 5, 6, 1, 1, 1, 4, 2, 4, 4, 9, 1, 4, 0, 0, 3, 3, 7, 3, 5, 1 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

1,3

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=1.0594087690700374784541932256923653250679611...

MATHEMATICA

a = 4; 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, 1.05, 1.06}, WorkingPrecision -> 110]

RealDigits[r]  (* A198990 *)

CROSSREFS

Cf. A198755.

Sequence in context: A222074 A245735 A303497 * A153356 A129956 A305865

Adjacent sequences:  A198987 A198988 A198989 * A198991 A198992 A198993

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Nov 01 2011

STATUS

approved

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Last modified August 26 00:35 EDT 2019. Contains 326324 sequences. (Running on oeis4.)