A case against the x<>y key

[Mark Hardman]

(05-10-2015 06:49 PM)Thomas Klemm Wrote:  That's not how to calculate \(-9^{2^3}\).
The negative sign changes the whole expression:

2
ENTER
3
y^x
9
x<>y
y^x
CHS

Only since the whole product is squared this doesn't matter.

Cheers
Thomas

PS: The 2nd ENTER after 3 is probably a typo.

Honestly, when I ran through this initially, I made two shortcuts: eliminated the sign change owing, as you said, to the inner-most expression being squared; and I did \(9^8\) to save a level on the stack.

The extra enter is indeed a mistake (corrected).