A200584 Decimal expansion of least x>0 satisfying 2*x^2-4*x+1=tan(x).

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

Offset: 0

Author

Clark Kimberling, Nov 19 2011

Keywords

• nonn
• cons

Comments

See A200338 for a guide to related sequences. The Mathematica program includes a graph.

Examples

			x=0.21836578027162386516787882454809036658912231...
		

Crossrefs

Cf. A200338.

Programs

Mathematica

a = 2; b = -4; c = 1;
f[x_] := a*x^2 + b*x + c; g[x_] := Tan[x]
Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, .2, .3}, WorkingPrecision -> 110]
RealDigits[r]   (* A200584 *)