359 reputation
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age 23
visits member for 3 years, 6 months
seen Jun 30 '13 at 13:58

"An expert is a person who has made all the mistakes that can be made in a very narrow field." Niels Bohr


Dec
11
comment Proving a function is surjective
thanks. this makes a lot of sense
Dec
11
comment Proving a function is surjective
thanks. this explanation really helped.
Aug
12
comment Set Theory: Proving Statements About Sets
lol thanks. now i know
Aug
12
comment Set Theory: Proving Statements About Sets
What would be a more appropriate title?
Aug
12
comment Set Theory: Proving Statements About Sets
Symmetry meaning each set has one element that is not in the other?
Aug
11
comment Set Theory: Proving Statements About Sets
How did you know to pick those element for A, B, and C? Was it just trial and error?
Aug
11
comment Set Theory: Proving Statements About Sets
Ahh, now I see how it works. Very Clever.
Aug
11
comment Set Theory: Proving Statements About Sets
Oh ok. Now I understand. Thanks for the clarification
Aug
11
comment Set Theory: Proving Statements About Sets
Isn't the intersection of A and B 3 and the intersection of A and C is 2?
Aug
11
comment Set Theory: Proving Statements About Sets
Right, so why can't I use that to disprove this
Aug
11
comment Set Theory: Proving Statements About Sets
the ~ means complement, so it is important
May
4
comment How many permutations of a word do not contain consecutive vowels?
@Michael - the reason for me adding that question in the body of the post is to help people understand where I was having difficulty answering the question. I apologize if that confused you.
May
4
comment How many permutations of a word do not contain consecutive vowels?
@Michael - That's a very interesting way to look at it. I guess if all else fails you can just look at all the different possibilities. However, I believe the answer is 12,600.
May
4
comment How many permutations of a word do not contain consecutive vowels?
alright thanks.
May
4
comment How many permutations of a word do not contain consecutive vowels?
How do you know that there are 7 spaces for the 5 vowels to go in?
Apr
29
comment Find the arc length of the cardioid: r = 3-3cos θ
alright thanks!
Apr
29
comment Find the arc length of the cardioid: r = 3-3cos θ
Does the θ/2 come from the fact that the original trig identity is 1-cos(2x) = 2 sin^2 x and you need the θ/2 to cancel out with the 2x?
Mar
8
comment How to sketch the curve of parametric equations
alright. thanks for all your help :)
Mar
8
comment How to sketch the curve of parametric equations
i guess i was hoping for a "fast" solution, but i now know with parametric equations, there doesn't appear to be any simple or straightforward method.
Mar
8
comment How to sketch the curve of parametric equations
very informative! ok so basically, you want to analyze exactly what the functions x and y are doing and that will give you the complete curve. and the part of the unit circle that is graphed is the right half.