A200400 Decimal expansion of least x>0 satisfying 3*x^2+4*x+3=tan(x).

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

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..99.

Example

x=1.507794338269835087314754236104362596090339991214999...

Mathematica

a = 3; b = 4; c = 3;
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, 1.5, 1.6}, WorkingPrecision -> 110]
RealDigits[r]  (* A200400 *)

Crossrefs

Cf. A200338.

Sequence in context: A112254 A180660 A221711 * A190147 A346190 A108745

Adjacent sequences: A200397 A200398 A200399 * A200401 A200402 A200403

Keyword

nonn,cons

Author

Clark Kimberling, Nov 17 2011

Status

approved