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visits member for 2 years, 5 months
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I was born to answer lhfs.


Dec
22
comment Is a counterexample considered a rigorous proof that a property is not true?
+1 Simple and sweet :)
Dec
22
asked Is a counterexample considered a rigorous proof that a property is not true?
Dec
22
revised How can I algebraically prove that $2^n - 1$ is not always prime?
added 30 characters in body; edited title
Dec
22
accepted How can I algebraically prove that $2^n - 1$ is not always prime?
Dec
22
comment How can I algebraically prove that $2^n - 1$ is not always prime?
@Markbennet: Oh yes, thanks.
Dec
22
comment How can I algebraically prove that $2^n - 1$ is not always prime?
And what would be the factored form of $2^{ab} - 1$? :-) P.S.: Hey Brian!
Dec
22
comment How can I algebraically prove that $2^n - 1$ is not always prime?
I like it :-). So, the main point of our proof is that it is not prime since it has factors.
Dec
22
comment How can I algebraically prove that $2^n - 1$ is not always prime?
It should be a formal proof :)
Dec
22
comment How can I algebraically prove that $2^n - 1$ is not always prime?
It is a proof...
Dec
22
asked How can I algebraically prove that $2^n - 1$ is not always prime?
Dec
22
answered Show that $\gcd(a,b)=|a| \iff a | b$
Dec
21
answered Is zero odd or even?
Dec
21
comment A pencil approach to find $\sum \limits_{i=1}^{69} \sqrt{\left( 1+\frac{1}{i^2}+\frac{1}{(i+1)^2}\right)}$
@Quixotic: Why do I always find you on different sites? :O
Dec
20
answered $2^{10 - x} \cdot 2^{10 - x} = 4^{10-x}$
Dec
19
comment How to multiply out a statement form?
+1 for formatting :)
Dec
19
answered Solving $|x^2 - 1| - 1 = 3x - 2$ without graphing
Dec
19
revised Inequality involving expectation
formatting, spelling
Dec
19
suggested approved edit on Inequality involving expectation
Dec
19
comment Can't argue with success? Looking for “bad math” that “gets away with it”
It is ridiculous how a student knows about radicals and division before learning their multiplication tables. ;)
Dec
19
revised Basic algebra but can't get answer that fits
formatting and grammar.