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 A198423 Decimal expansion of x>0 having x^2-x=4*sin(x). 1

%I

%S 2,2,9,8,8,5,3,5,8,2,2,7,7,4,0,3,2,9,5,2,0,6,0,5,9,1,9,6,1,5,3,4,3,3,

%T 3,5,0,8,7,3,9,3,2,2,5,2,2,3,1,3,2,3,3,0,8,3,4,5,5,7,6,0,3,5,8,5,5,5,

%U 9,6,2,5,4,0,0,2,4,3,9,7,6,8,9,5,0,6,4,7,0,4,2,0,0,8,4,0,7,6,7

%N Decimal expansion of x>0 having x^2-x=4*sin(x).

%C See A198414 for a guide to related sequences. The Mathematica program includes a graph.

%e x=2.2988535822774032952060591961534333...

%t a = 1; b = -1; c = 4;

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

%t Plot[{f[x], g[x]}, {x, -1, 2.5}]

%t r = x /. FindRoot[f[x] == g[x], {x, 2.29, 2.3}, WorkingPrecision -> 110]

%t RealDigits[r] (* A198423 *)

%Y Cf. A198414.

%K nonn,cons

%O 1,1

%A _Clark Kimberling_, Oct 25 2011

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Last modified November 28 03:26 EST 2021. Contains 349400 sequences. (Running on oeis4.)