login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A200414 Decimal expansion of least x>0 satisfying 4*x^2+x+3=tan(x). 2

%I #5 Mar 30 2012 18:58:00

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

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

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

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

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

%e x=1.4966167479915742686602815268613907032003235186...

%t a = 4; b = 1; c = 3;

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

%t Plot[{f[x], g[x]}, {x, -.1, Pi/2}, {AxesOrigin -> {0, 0}}]

%t r = x /. FindRoot[f[x] == g[x], {x, 1.4, 1.5}, WorkingPrecision -> 110]

%t RealDigits[r] (* A200414 *)

%Y Cf. A200338.

%K nonn,cons

%O 1,2

%A _Clark Kimberling_, Nov 18 2011

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 15:57 EDT 2024. Contains 371961 sequences. (Running on oeis4.)