Recent content by mohlam12

Thank you. I think the problem was misstated.

I figured it out. Thanks :)

Hello, So I was studying for my exam and came across this exercice we did in class and which I really don't know how we got the answer. It says that if we have a FM with a carrier frequency of 4MHz, and the bandwidth is 400KHz, what is then the maximum deviation.. The answer is 200KHz...

Hello, I'd like to know the relation between the sampling frequency and the quantization. If the sampling frequency is 200KHz, and the analog signal ahs a maximum frequency of 80KHz, How many bits will the qantization be done to have a 6Mb/s bitrate?

don't know if this is the right place to ask, but I've been wondering: can ever a plane land over an aircraft carrier, which is also a plane, both in flight? if so, how should they do that?

Sorry everyone, I'll give explanation in french so he can solve it quickly. Alors on a trois forces, P le poids, R les frottements, et F une certaine force de rappel appliquée par le ressort. En appliquant le principe fondamental de la dynamique de rotation, on a, et en choisissant un sens...

My bad ! Here's the exact question : "Demonstrate that if P, Q, and R belong to R[X], therefore P² - XQ² = XR² imply that P=Q=R=0" Big logic mistake in my first post -.- sorry

Hey ! I'm fluent in french and have done some mechanics in my first year. Maybe I can help you if you write the original question in french ?

X is the variable ! We can rewrite the problem this way : if P(X), Q(X) and R(X) belongs to R[X], then writing P²(X) = X(Q²(X) + R²(X)) means P(X)=Q(X)=R(X)=0 Someone adviced me to start with demonstrating that constant coefficients are equal to 0 ? :s

Hi everyone, I have to demonsrate that for every real polynomial, P Q and R, I have : P²=X(Q²+R²) ==imply==> P=Q=R=0 Using degrees, we can easily demonsrate the above. However, I'm looking for another way, without using that.

hey everybody i need help solving this.. i have e function a(x) = x - sin x x belongs to -pi/2, pi/2 i need to demonstrate that for x>=0, a(x)>=0 i tried to derivate the function to get 1-cosx which is positive, therefore a(x) is positive too.. but then i'd face problems when it comes...

yes.. but it is an indeterminate form... how is it equal to zero

okay the limit of (3/2)^x is +infinity but i have to show that the limit of \frac{x^{2/3}}{3^x} is zero... how ?? maybe I have to show that it is smaller than a number, then the limit of that number should be zero... by the way, we haven't studied exponentials yet.. PS: I think this should be...

please any hints to solve this limit when x tends to +infinity is way very appreciated ! PS: i should not use the hopital rule... I tried to factorize the x from the nominator and denominator but couldn't get to any result... i tried some other things.. but still nothing. \frac{x^{\frac{2}{3}}...

ooops...