How to store exact symbolic results in preconfigured lists L#

[Nigel (UK)]

I get the same result as you: I'm using the emulator, I'm in CAS mode and "exact" is ticked. However, if I store the list {v,v^2,v^3} into a CAS variable (e.g., l1) then l(3) is 1. This is reasonable - as I understand it, Home variables (like L1) can only contain numbers while CAS variables can contain expressions.

After typing

Code:


L1 := seq(Simplify(v^k),k,1,3)

L1(3) is exactly 1. It seems that the routine used to convert a CAS expression into a number for the Home screen does not itself call Simplify. I can understand this - to simplify a complicated expression might take a long time.

Nigel (UK)