The HP70 and it's limitations.

[Harald]

(01-26-2018 10:08 PM)SlideRule Wrote:  Perhaps

4; Enter; 0.5; Y^x
or
4, Enter, 1, Enter, 2, /, Y^x
etc.

SlideRule

am I missing something?

You are not missing anything, it is all there.
It is just that I forgot about square root not being available. So my next thought was y^(1/2). I usually prefer entering 0.5 as 2 1/X, don't ask me why, I don't know. And in attempting that I forgot 1/X isn't there either.
Both sqrt and 1/X are functions I use a lot. So it always surprises me they have been left of the HP 70.