The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A197843 Decimal expansion of least x having x^2+2x=2*cos(x). 3
 1, 7, 7, 3, 2, 3, 2, 1, 5, 7, 4, 9, 1, 7, 1, 6, 7, 2, 7, 0, 3, 8, 9, 9, 4, 6, 4, 1, 9, 7, 0, 8, 1, 6, 4, 1, 4, 1, 0, 2, 3, 7, 2, 3, 3, 5, 3, 6, 6, 7, 2, 8, 8, 2, 4, 4, 9, 4, 6, 2, 8, 1, 2, 1, 2, 5, 3, 7, 2, 4, 5, 4, 6, 6, 0, 4, 1, 4, 2, 7, 2, 1, 9, 2, 9, 7, 3, 7, 4, 8, 3, 3, 9, 8, 1, 1, 2, 3, 8 (list; constant; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS See A197737 for a guide to related sequences.  The Mathematica program includes a graph. LINKS EXAMPLE least x: -1.77323215749171672703899464197081641... greatest x: 0.620762336586614714452120247321515... MATHEMATICA a = 1; b = 2; c = 2; 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, -1.8, -1.7}, WorkingPrecision -> 110] RealDigits[r1]  (* A197843 *) r2 = x /. FindRoot[f[x] == g[x], {x, .62, .63}, WorkingPrecision -> 110] RealDigits[r2] (* A197844 *) CROSSREFS Cf. A197737. Sequence in context: A199613 A136141 A264806 * A211074 A204067 A291364 Adjacent sequences:  A197840 A197841 A197842 * A197844 A197845 A197846 KEYWORD nonn,cons AUTHOR Clark Kimberling, Oct 20 2011 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified March 28 20:44 EDT 2020. Contains 333103 sequences. (Running on oeis4.)