Math Forum :: View topic – Numerical approximation of sum involving 2 power towers

If (x, y are known), is there any good way to approximate z (7-8 digit precision is required; 15-16 is the best)? (Edit: x, y y, x – y < 1/57)

Last edited by Kenny TM~ on Wed Oct 20, 2004 6:15 pm; edited 2 times in total