Cube root [HP-35]

[Gerson W. Barbosa]

(03-06-2020 01:41 PM)Albert Chan Wrote:  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

Nice change!

Another method, but more keystrokes, at least on the 8-digit Canon LC-37:

27
√ √ √ √ √ √ √ √ √ √ √
-
1 / 3
+ 1 =
× = × = × = × = × =
× = × = × = × = × =
× =
-> 3.000989

Replace 3 with 5 and you’ll get the 5th root: 1.9338459

From https://www.quora.com/Using-a-simple-cal...root-n-odd

PS: Again, it looks like they have trouble with /th/ – “...den press √ (12 times)” :-)