>_> I know I didn't do a lot of work but there is not much to work on from the book and I don't really know how to algebriacly manipulate integrals of the form g(x) = integral from 0 to infinity f(x,y)dy
Homework Statement
show that
xf(x)=integral from 0 to infinity of [B*(w)sin(wx)]dw , // B* is a function not B * w
where B* = -dA/dw
A(w) = 2/pi integral from 0 to infinity [f(v) cos(wv)] dv
Homework Equationsf(x)=integral from 0 to infinity [A(w)cos(wx)] dw
The Attempt at a Solution...
wait why is it wrong again? I thought if you start with an assumption but go with <=> and reach Tautology then the assumption is true? like prove x+1>x
x+1>x if and only if 1>0 which is true so x+1>x
so why couldn't he say
sqrt(x) + sqrt(y) >= sqrt(x+y) given that x,y >0
if and only if...
yes well I made my topic title for a more general question is, what is a good guide line to answer such questions, How to study for them etc? I don't feel those discussion questions make a good self study materials.
Well ok I guess kinetic friction is under place, but I still need a hint on how to solve such question, rereading my lectures notes and the book doesn't help much. Am I doing something wrong?, or are those questions meant to be answered via googling and such?
also about the second question I...
Well the friction between those two blocks is static since they are on top of each other they don't move with respect to each other, when I climb a slippery hill isn't it also static friction?
Ermm I don't know exactly what you mean by climbing a slippery hill though.
Well I think the more -interesting- time would be the t=2.66 since the object was at origin and not moving at t = 0
for 3 you can just use mean value theorem for integrals right?
average f(x) from a to b = integral from a to b f(x)dx/b-a
Hello I took a general physics course 2 years ago, and now I am trying to refresh a bit on my knowledge of physics so I started solving discussion questions+problems in University physics by young
My problem is I can't verify my answers nor can I look for the correct answer if I don't know...
I wasn't given an evidence of it but I did ask a calculus professor and he said that he had encountered this question before in term of infinite series and said that all the derivatives are equal to 0 and this function is not equal to it's maclurian series representation, though I don't know if...
Homework Statement
Let's say an object is moving with x(t)= e^(-1/t^2)
it's motion is continuous everywhere and differentiable because its exponential
so v(t)= 2e^(-1/t^2)/t^3
a(t)= e^(-1/t^2) *(4-6t^2)/t^6
I have asked to a calculus teacher and he said all the derivatives will be 0 at...