2.2.3 Can you answer these questions?

2.2.3.1 Exclusion disappears but style doesn't work

http://mathematica.stackexchange.com/questions/73894/exclusion-disappears-but-style-doesnt-work

 
Consider this code: 
 
f[x_]:=(6 + 4 x + x^2 - x^3)/(x-2) 
Plot[f[x], {x, -10, 10}, 
Exclusions -> {2}, 
ExclusionsStyle -> Directive[Red, Dashed]] 
 
 
It produces this image. 
 
 
 
Note that the vertical  ...
 

- asked by David 4votes

2.2.3.2 What is Association[Rule["ID",number ] and how it is used

http://mathematica.stackexchange.com/questions/74197/what-is-associationruleid-number-and-how-it-is-used

 
I am trying to understand the structure and the use of Dataset and I 
came across something new to me. 
 
First check this example: 
 
ds1=Dataset[{ 
<|"a" -> 1, "b" -> "x", "c" -> 6|>, 
...
 

- asked by Algohi 4votes

2.2.3.3 Can I get a symbol cross-reference of a Mathematica Notebook?

http://mathematica.stackexchange.com/questions/73927/can-i-get-a-symbol-cross-reference-of-a-mathematica-notebook

 
Is there a way to get a cross reference listing for a notebook or set of 
notebooks?
 

- asked by Ralph Dratman 1vote

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