Recent content by Eng67

I see that this topic totally stumps everyone! LOL I have solved ths with an answer of 0.5 e^(-jw)/((1-0.5e^(-jw))^2)

I am trying to compute the DTFT of x[n]=n(.5)^n u[n]. This is my work so far. Is this correct?

That was the exact answer that I came up with! Thanks all for the replies!

Thanks Shmoe! I was able to work through to a solution. I agree with HallsofIvy That this question is confusing.

I am trying to find the polar notation for 1 + e^(j4) I know that e^(jx) = cos x + jsin x = cos(4) + jsin(4) I can then find the magnitude and angle. This is nowhere close to the answers below. 1) cos(2) + 1 2) e^(j2)[2cos(2)] 3) e^(-j4)sin(2) 4)...

I have been having a difficult time understanding how to determine the input/output difference equations of a circuit. I believe I am good on series circuits but would like some feedback on Series/parallel determinations. Please look at included file and see if I am on the correct path.

Thanks so much for the assistance!

I am having a problem finding the upper and lower (x,y) bounds for this problem. Find the centroid of r = 1 + cos(theta) which lies in the 1st quadrant. I come up with (2,0) and (1,0) or the axis intercept points. Is this the correct way to go about it? m=((∫)[0]^2 ) (∫)[0]^1

Thanks! This is now so simple.

So I then would have sqrt(x^2+y^2)= (2cos(2arctan y/x))/sqrt(x^2+y^2) I am still stuck.

I am at a standstill with the solution to this problem. I need to convert r^2=2cos(2 theta) to rectangular form. I know that x = rcos(theta) and y = rsin(theta) so far I have r = (2cos(2theta))/r then I substitute for r sqrt(x^2+y^2)= (2cos(2theta))/sqrt(x^2+y^2) Then...

Thanks for the replies! It has become much clearer now.

I am having a problem with finding the constant K in This problem. The time rate of change of an alligator population P in a swamp is proportional to the square root of P. The swamp contains 9 alligators in 2000 and 25 alligators in 2005. When will there be 44 alligators in the swamp? I...

I am at a loss on how to get the correct answer to this question. How many comparisons are needed for a binary search in a set of 64 elements? I know the formula f(n) = f(n/2) + 2 I know the correct answer which is 14. No matter what I do I cannot come up with this answer...

Thanks. I finally found the correct reference for this formula. Many sources have this listed differently.