Post Reply 
CAS diff() giving incorrect results
09-24-2021, 10:48 AM
Post: #5
RE: CAS diff() giving incorrect results
(09-23-2021 06:20 PM)Wes Loewer Wrote:  When I try (x^3)''(x = 4) it gives a warning and returns (6*x) = 24,

When I try same expression in the emulator, above return only 24, without warning.
I beiieve (x^3)''(x = 4) equivalent to subst((x^3)'', x = 4), only less typing.

Quote:That's an interesting notation. It appears to work for other functions as well.

If the expression is not a function, the notation may get confused with implied multiply.

XCAS> (1+x+x^2) (x=0.1)

Warning : using implicit multiplication for (1+x+x^2)(x=0.1)

CAS> (1+x+x^2) (x=0.1)         → "Syntax Error"

We can get around the problem (both CAS and XCAS) with identity function.

CAS> id(1+x+x^2) (x=0.1)       → 1.11
Find all posts by this user
Quote this message in a reply
Post Reply 

Messages In This Thread
RE: CAS diff() giving incorrect results - Albert Chan - 09-24-2021 10:48 AM

User(s) browsing this thread: 1 Guest(s)