½ n√ √ 1 + aa - a
(4) y =
½ /
n√
√ 1 + aa - a
-
½ /
n√
√ 1 + aa + a
For Example, Let the Root of this Equation of the Fifth Power be required 5y + 20y3 + 16y5 = 4 in which case n is = 5, and a = 4, and the Root, according to the first Form, is
y = ½
5√
√ 17 + 4
-
½ /
5√
√ 17 + 4