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Replacing "x" is not right!
07-23-2017, 12:22 AM
Post: #3
RE: Replacing "x" is not right!
Spybot,

I could be wrong, but I don't think what you used is a replacement operator. It's a constraint operator. In words you asked the calculator to tell you what x^4-x^2+5 is if x=-x. The only time x=-x is when x=0 so it stuck in 0 for x and returned 5.

You probably want subst(x^4-x^2+5,x=-x) which returns (-x)^4-(-x)^2+5.

-road
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Messages In This Thread
Replacing "x" is not right! - Spybot - 07-22-2017, 10:21 PM
RE: Replacing "x" is not right! - roadrunner - 07-23-2017 12:22 AM
RE: Replacing "x" is not right! - Spybot - 07-23-2017, 01:45 AM
RE: Replacing "x" is not right! - Spybot - 07-23-2017, 01:57 AM
RE: Replacing "x" is not right! - DrD - 07-23-2017, 12:03 PM
RE: Replacing "x" is not right! - parisse - 07-23-2017, 07:42 AM
RE: Replacing "x" is not right! - chazzs - 08-02-2017, 10:45 PM
RE: Replacing "x" is not right! - Spybot - 08-04-2017, 02:49 AM
RE: Replacing "x" is not right! - Spybot - 12-12-2017, 04:21 PM
RE: Replacing "x" is not right! - Rudi - 12-31-2017, 02:36 PM



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