Alright, I got it
If a|3c then a is a multiple of 3
then b is also a multiple of 3, as a divides it
therefore a|b+c = b/a + c/a
and thus a|c
therefore a|3c
If a divides b, and a divides b+c then a divides 3c.
How do I go forward with this?
This is what I've done so far:
suppose a|b and a|b+c
then b = an for some integer n
and c = am for some integer m
∴ b+c = an+am
= a(n+m)
= ak for some integer k
but I...
Sorry, not really.
What values do I put in for for \hat{i}?
And what's the \hat{n}? And do I pull E out of the integration as a constant? Then integrate da just to a?
I'm sorry, I just got into this class two weeks late, and this is due tomorrow. But I'm going to spend this week catching up.
An E field exists in a region of space and it can be described by:
\bar{E} = \hat{i}xy^2
Calculate the flux through a cube of size 1.0m, with one end extending into the positive x,y and z directions.
Find the charge enclosed.
I have no idea how to start this? can someone point me in...