for the domain question, would you still be right in saying:
R\ (-8,-2) 
?
This is mathematically incorrect. You cannot mix set notation with interval notation. The correct notation is R\{x: -8<x<-2) or (-infinite,infinite)\(-8,-2) or (-infinite,-8)U(-2,infinite) or {x:x<=-8}U{x:x>=-2}.
Dr He. told us a story of a chick from MacRob that made this error one year in Methods and lost marks. He also suggested that it was because of these marks that she didn't get 99.95 because she got 99.90 at the end.
There has been a lot of argument about the coin question and whether or not the probability of getting head can equal to zero.
Here's what I found:
http://en.wikipedia.org/wiki/ProbabilityThe certainty we adopt can be described in terms of a numerical measure and this number, between 0 and 1, we call probability
If probability is between 0 and 1, you can't have p=0. But after further reading I found all this stuff about the possibility of zero probabiliy, even negative probabiliy
But the main argument is that the question asked for the 'value' not 'values' of p so since we are only required to give one answer, p=3/4.
But then again, I got the question wrong due to careless algebraic mistakes...ended up with p=2/3
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