Why The function APP failled to find an extremum in this case
11-15-2015, 10:03 AM (This post was last modified: 11-15-2015 10:06 AM by dg1969.)
Post: #1
 dg1969 Member Posts: 95 Joined: Apr 2014
Why The function APP failled to find an extremum in this case
Good morning dear "Primers",

Can you explain why the function App failed if i ask for an extremum of $$f(x)$$?
$$f(x)=\frac{1}{9} \cdot (84\cdot x e^{-3\cdot x}-2 e^{-3\cdot x}+2)$$
Code:
f(x):=1/9*(84*x*e^(-3*x)-2*e^(-3*x)+2)

1) I create $$f(x)$$ in CAS side. Have you notice the Latex command ? Did you know that ? !
CTRL+C CTRL+V to paste on these post !!! ;o) Thank's to M. PARISSE !

2) I choose F1(X)=f(X)

Here notice that the EVAL softKey do nothing !? Why ?

3)Plot and choose "EXTREMUM"

4) Can't find an extremum !!
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