OFFSET
0,1
COMMENTS
LINKS
Muniru A Asiru, Table of n, a(n) for n = 0..2000
FORMULA
greatest root: -2 + (2/3)*sqrt(14)*cos((1/3)*arctan(sqrt(181/2)/9))
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middle: -2 - (1/3)*sqrt(14)*cos((1/3)*arctan(sqrt(181/2)/9)) + sqrt(14/3)*sin((1/3)*arctan(sqrt(181/2)/9))
****
least: -2 - (1/3)*sqrt(14)*cos((1/3)*arctan(sqrt(181/2)/9)) - sqrt(14/3)*sin((1/3)*arctan(sqrt(181/2)/9))
EXAMPLE
greatest root: 0.4033761543003640184...
middle root: -2.623324901998131634... [Corrected by A.H.M. Smeets, Sep 17 2018]
least root: -3.780051252302232384...
MAPLE
evalf(solve(3*x^3+18*x^2+22*x-12=0, x)[1], 90); # Muniru A Asiru, Oct 07 2018
MATHEMATICA
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Sep 14 2018
STATUS
approved