Recent content by angryfaceofdr

My fear is what if I "choose" the wrong statement A like I did in post #3? How would I know what the "right" statement is?

How does one know when to do this?

How would you get \neg A ? Do you negate closed and the interval as a>x>b? Or in other words, " Assume the functions u_n (x) are not continuous on the not closed interval a > x > b"?

What can I conclude using the following theorem? Let the functions u_n (x) be continuous on the closed interval a \le x \le b and let them converge uniformly on this interval to the limit function u(x) . Then \int_a^b u (x) \, dx=\lim_{n \to \infty} \int_a^b u_n (x) \, dx Can...

A follow up to this... http://en.wikipedia.org/wiki/Euclidean_space wiki says : "For any non-negative integer n, the space of all n-tuples of real numbers forms an n-dimensional vector space over R, which is denoted R^n and sometimes called real coordinate space. An element of R^n is...

Is my post from #3 correct? Ok, so in linear algebra I recall reading something along the lines of Theorem 1: Suppose , \vec{u} and \vec{v} are vectors in \mathbb{R}^n . We say that \vec{u} and \vec{v} are orthogonal if \vec{v}\cdot \vec{u}=0 . So... say we are "in"...

its fine, happens to everyone

errr... I got b=+/- 3/7 = \pm \frac{3}{7} ahh okay cool

hmmm... so 2b+d=0 ----> d=-2b 2b+3c=0----> c=-(2/3)bb^2+c^2+d^2=1=(4/9)b^2+4b^2+b^2 b^2=9/49

means that the two vectors are orthogonal to each other

which is what you want right ?

no problem, good luck! HINT:

whooops should be b^2+c^2+d^2=1

I usually just eliminate enough variables so that it fits with the number of equations i have (and pray it works)

To tell you the truth, I don't know... I think you might lose too much information if you use too many zeros