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A198368 Decimal expansion of greatest x having 4*x^2+3x=4*cos(x). 3
6, 0, 6, 0, 7, 7, 7, 8, 3, 6, 4, 8, 6, 2, 6, 4, 5, 3, 6, 6, 5, 7, 9, 7, 7, 5, 7, 9, 9, 0, 5, 6, 2, 9, 1, 0, 5, 7, 8, 9, 9, 1, 3, 1, 8, 1, 7, 8, 8, 5, 7, 2, 2, 2, 5, 3, 4, 2, 4, 7, 5, 8, 6, 3, 2, 8, 9, 9, 8, 4, 2, 0, 5, 8, 9, 6, 2, 9, 7, 9, 1, 6, 6, 8, 0, 4, 3, 0, 9, 4, 1, 8, 4, 6, 8, 0, 6, 3, 2 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

See A197737 for a guide to related sequences.  The Mathematica program includes a graph.

LINKS

Table of n, a(n) for n=0..98.

EXAMPLE

least x: -1.128864420523986139477004663061889573...

greatest x: 0.60607778364862645366579775799056291...

MATHEMATICA

a = 4; b = 3; c = 4;

f[x_] := a*x^2 + b*x; g[x_] := c*Cos[x]

Plot[{f[x], g[x]}, {x, -2, 1}]

r1 = x /. FindRoot[f[x] == g[x], {x, -1.2, -1.1}, WorkingPrecision -> 110]

RealDigits[r1] (* A198367 *)

r2 = x /. FindRoot[f[x] == g[x], {x, .60, .61}, WorkingPrecision -> 110]

RealDigits[r2] (* A198368 *)

CROSSREFS

Cf. A197737.

Sequence in context: A010677 A021169 A303494 * A064373 A195290 A280692

Adjacent sequences:  A198365 A198366 A198367 * A198369 A198370 A198371

KEYWORD

nonn,cons

AUTHOR

Clark Kimberling, Oct 24 2011

STATUS

approved

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Last modified August 19 04:34 EDT 2019. Contains 326109 sequences. (Running on oeis4.)