From the equation tanh (x) = 710( 17 ), re (-1, 1) 2 / V 0 X 0 - 1 y - tanh (x) -21 we see that . tanh (0) = 0 . tanh (1/2) = 1 I . tanh (-1/2) = . tanh Note: the Maple syntax for v 2 is sqrt (2)