A201893 Decimal expansion of the number x satisfying x^2+2x+4=e^x.

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

Offset

1,1

Comments

See A201741 for a guide to related sequences. The Mathematica program includes a graph.

Links

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

Example

x=2.9034468790268968582868881770340759008300...

Mathematica

a = 1; b = 2; c = 4;
f[x_] := a*x^2 + b*x + c; g[x_] := E^x
Plot[{f[x], g[x]}, {x, -2, 3}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, 2.9, 3.0}, WorkingPrecision -> 110]
RealDigits[r]    (* A201893 *)

Crossrefs

Cf. A201741.

Sequence in context: A228249 A011063 A021779 * A264920 A324833 A019969

Adjacent sequences: A201890 A201891 A201892 * A201894 A201895 A201896

Keyword

nonn,cons

Author

Clark Kimberling, Dec 06 2011

Status

approved