OFFSET
0,1
COMMENTS
FORMULA
greatest root: -2/3 + (4/3)*cos((1/3)*arctan(3*sqrt(7)))
****
middle: -2/3 - (2/3)*cos((1/3)*arctan(3*sqrt(7))) + (2*sin((1/3)*arctan(3*sqrt(7))))/sqrt(3)
****
least: -2/3 - (2/3)*cos((1/3)*arctan(3*sqrt(7))) - (2*sin((1/3)*arctan(3*sqrt(7))))/sqrt(3)
EXAMPLE
greatest root: 0.5148689384387165869...
middle root: -0.7223517244643762951...
least root: -1.792517213974340291...
MATHEMATICA
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Clark Kimberling, Aug 19 2018
STATUS
approved