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[20
August 2020] Today I
took a back-track and focussed on
that initial problem of doing 40.3
= 1.516 on my calculator. I had come
to realise that my calculator only
had buttons for square roots and
cube roots; I couldn't change the 2
or 3 to anything else. The user
manual I had found online was for
the Casio fx-85W and not
specifically my fx-85VH. It showed
illustrations of the x√
key and gave instructions on how to
use it, but these didn't help me.
Then,
while I was trying to make sense of
the various model numbers I saw a
picture of fx-115S of which the
buttons look very similar to mine
and I managed to download a manual
for that one instead. Most notably
the fx-115S has above its Xy
button the illusive x√
key. On my calculator it is shown as
X1/y
I then
headed to the relevant section of
that manual and found these examples
on page 96:
On the
second one I changed the numbers for
the troublesome 40.3 and
got 1.516 . . .! Yay. It now seems
so simple and I'm not sure why I had
difficulty from the start.
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