OFFSET
1,1
COMMENTS
FORMULA
greatest root: -(1/2) + sqrt(7/3) cos(1/3 arctan((2 sqrt(79/3))/3))
middle: -(1/2) - 1/2 sqrt(7/3) cos(1/3 arctan((2 sqrt(79/3))/3)) + 1/2 sqrt(7) sin(1/3 arctan((2 sqrt(79/3))/3))
least: -(1/2) - 1/2 sqrt(7/3) cos(1/3 arctan((2 sqrt(79/3))/3)) - 1/2 sqrt(7) sin(1/3 arctan((2 sqrt(79/3))/3))
EXAMPLE
greatest root: 0.88922855912919436594...
middle root: -0.64458427322415498454...
least root: -1.7446442859050393814...
MATHEMATICA
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Aug 08 2018
STATUS
approved