A201751 Decimal expansion of the least x satisfying -x^2+2=e^x.

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

Offset: 1

Author

Clark Kimberling, Dec 05 2011

Keywords

• nonn
• cons

Comments

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

Examples

			least:  -1.3159737777962901878871773873012710...
greatest:  0.53727444917385660425676298977967...
		

Links

• Index entries for transcendental numbers.

Crossrefs

Cf. A201741.

Programs

Mathematica

a = -1; b = 0; c = 2;
f[x_] := a*x^2 + b*x + c; g[x_] := E^x
Plot[{f[x], g[x]}, {x, -2, 1}, {AxesOrigin -> {0, 0}}]
r = x /. FindRoot[f[x] == g[x], {x, -1.4, -1.3}, WorkingPrecision -> 110]
RealDigits[r]    (* A201751 *)
r = x /. FindRoot[f[x] == g[x], {x, .5, .6}, WorkingPrecision -> 110]
RealDigits[r]    (* A201752 *)