Cube root [HP-35]

[Albert Chan]

This is a rare case which CHAIN take less keystrokes than RPN

I would swap the order of the keys though, so successive iterations improve the cube root

Code:

; CHAIN calculator, N^(1/3) = N^(5/15)
27                   ; N
√ √ ×                ; N^0x0.4    = 2.279507057
√ √ ×                ; N^0x0.5    = 2.800923042
√ √ √ √ ×            ; N^0x0.55   = 2.987153223
√ √ √ √ √ √ √ √ ×    ; N^0x0.5555 = 2.999949710