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A197839
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Decimal expansion of least x having x^2-4x=-cos(x).
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3
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2, 5, 8, 3, 9, 2, 1, 4, 4, 3, 7, 1, 5, 9, 9, 6, 7, 4, 0, 2, 7, 5, 7, 4, 2, 3, 8, 0, 7, 3, 8, 6, 0, 2, 7, 5, 2, 6, 1, 0, 1, 6, 7, 1, 1, 3, 5, 5, 3, 3, 3, 7, 1, 4, 8, 5, 1, 6, 5, 7, 1, 4, 3, 0, 0, 8, 6, 6, 0, 7, 0, 4, 4, 6, 0, 0, 0, 8, 7, 7, 8, 1, 4, 7, 0, 5, 5, 3, 8, 8, 8, 7, 4, 3, 7, 8, 8, 4, 2
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OFFSET
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0,1
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COMMENTS
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See A197737 for a guide to related sequences. The Mathematica program includes a graph.
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LINKS
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EXAMPLE
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least x: 0.25839214437159967402757423807386027526101...
greatest x: 4.13257347075386830819844170536280612105...
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MATHEMATICA
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a = 1; b = -4; c = -1;
f[x_] := a*x^2 + b*x; g[x_] := c*Cos[x]
Plot[{f[x], g[x]}, {x, -1, 5}]
r1 = x /. FindRoot[f[x] == g[x], {x, -4.2, -4.1}, WorkingPrecision -> 110]
r2 = x /. FindRoot[f[x] == g[x], {x, 4.1, 4.2}, WorkingPrecision -> 110]
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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