Recent content by solar nebula

2. Solving an inquality

Homework Statement So this is the question |x-1|+|x-2|>1 Homework Equations N/A The Attempt at a Solution I tried it, the solution seems right, but i don't know if my approach is correct.
3. Multiplicity of a gas

its wrong: it should be [(1/N!)*((A*pi)^N)*(2MU)^N]/ (h^2N)*(N!)
4. Finding the domain for inequality

I think i got it now:, Also when i take a square root of a number, isn't that i should take the positive and negative root?. I understand for \sqrt{x^2}=x, because its basically \abs{x}
5. Finding the domain for inequality

Just to make it simple to solve for now, i am not going to look at case a=0 (only for now) so i tired to do this: Again my solution is wrong, i am now covering the entire number line (-inf,+inf), i feel like i am messing up basic algebra. Please help
6. Finding the domain for inequality

Homework Statement The problem is: for all 0≤a≤1 so i need to find the domain Homework Equations N/A The Attempt at a Solution I tried it like this: yet my solution is wrong,i am not so sure why. wolfram gives me this;
7. Solving |x-1|*|x+1|=0

But when I try to do the same thing for |x-1|*|x+2|=3 which is: |x-1|*|x+2|=3 |x-1|=3 or |x+2|=3 x-1=3 or x+2=3 x=4 or x=1 But this solution does not make sense... please help, Thanks!
8. Solving |x-1|*|x+1|=0

Homework Statement find all the numbers x for which |x-1|*|x+1|=0 Homework Equations The Attempt at a Solution |x-1|*|x+1|=0 |x-1|=0 or |x+1|=0 x-1=0 or x+1=0 x=1 or x=-1 but I think there's a flaw some in my attempt solution...or the whole thing is a flaw.. any help...
9. Great web resource for math and more that I just found

Hi, I only used Khan Academy videos for Linear Algebra (even though i knew about them long before) because my prof puts up so we could see it before our linear algebra lecture. The videos are great. I am surprised you guys haven't heard of Khan Academy. cheers! p.s I'm sorry that the answer to...
10. Help with Michael Spivak's fourth edition calculus book

Well, I had taken a course in first semester(in which we used Spivak's book).Then dropped it and will be taking it in the second semester . Now that I have bit of time before second semester, I just want get a bit comfortable with proofs. Intwo said to try "How to Prove It: A Structured Approach...
11. Help with Michael Spivak's fourth edition calculus book

Thanks, I'll check it out.
12. Help with Michael Spivak's fourth edition calculus book

Can you please let me know the title of the Schaum's outline book? Thanks.
13. Help with Michael Spivak's fourth edition calculus book

I am a computer science student.The only proofs I have done is trigonometric proofs, when you show one side is equal to the other side. I have done high school calculus and functions, I know them well. Spivak's kind of math is the kind of math I want to learn, because it's no longer just...
14. Post for helm under learning section why is this?

Oh ok, thanks.
15. Help with Michael Spivak's fourth edition calculus book

Hi, I am having difficulties doing the problems in Michael Spivak's fourth edition calculus book. I am not sure how to approach the problems. I am able to understand the contents chapters but when I start to do the chapter problems, I have no idea how to do them.Any advice will be...