Cube root [HP-35]

[Juan14]

Fixed point iteration:

From x^3 – A = 0 we have: x^2 = A/x and x = √(A/x), we can use the last equation for the fixed point iteration method.
For example for A=27 and (with x0 = 27) we load the stack with 27.

27 ENTER ENTER ENTER

for the first steep we press

√ √

then for each iteration we press

/ √

after 10 iterations we have: x = 2.99919546023