I understand how to integrate this: ∫y2dy.
I don't understand how to integrate this:
di(t)/dt = i(t)p(t)
intergrate((di(t)/dt/i(t))*dt = p(t)dt) (see this image: http://i.imgur.com/OdKI309.png)
how do you perform the intergral on the left, seeing as as it not dt, but di(t)?
thanks
Hello, my textbook states that "Circuits that contain capacitors and/or inductors have memory". In what sense do they have memory?
my understanding of memory, is retaining value. how do inductors/capacitors retain value?
thanks
daniel
If I pinch hold a book, with 6N on either side why is there only one force, of 6 Newton on the free body diagram?
for example, the book has this free body diagram. http://i.imgur.com/pwtFZB6.png
there are two forces applied to each side of the book. so why is it, than in the free body diagram...
here is a geometric proof, similar to the one in my textbook (copied from Aryabhata, from http://math.stackexchange.com/questions/15294/why-is-the-area-under-a-curve-the-integral) :
Is this saying: that the A' equals the function. Which is implying, that the integration of A equals F (where F...
Homework Statement
I know you could prove this by stating every integer is either 3m, 3m+1 or 3m+2. However I am trying to prove this just using either even numbers or odd numbers.
so for example, when I try:
(2x+1)^2
= 4x^2 + 4x + 1 - expand
= 3x^2 + x^2 + 3x + x + 1 - group like...
hello, I am trying to solve this problem:
If w is an even integer, then w^2 - 1 is not a prime number.
my current working.
prove by contradiction
If w is a even integer then w^2 -1 is a prime number.
if w = 2x
then w^{2} -1
= 4x^{2} -1
I am not sure where to go from here, maybe congruence...
is this true or false:
If a|b and a|c, then one (or both) of b|c or c|b holds.
if I want to disprove this, can I:
let a = 5, x = 2 and y = 3.
b=ax
c=ay
then c=bz
and c = bg doesn't hold.