Homework Statement
Determine whether u[n] - u[n-4] is a power or energy signal.
Homework Equations
The Attempt at a Solution
I am stuck here. I don't know how to simply further. Please help.
Homework Statement
Homework Equations
The Attempt at a Solution
[/B]
Which is the correct frequency response graph for this question? The first graph or the second one?
Today, I had a class on Complex analysis and my professor wrote this on the board :
The Laplacian satisfies this equation :
where,
So, how did he arrive at that equation?
Homework Statement
Find the general solution.
Homework Equations
y"+y=x2sin2x
The Attempt at a Solution
Characteristic equation would be:
m2 + 1 = 0
So,m2 = -1
Therefore, m = i or m = -i.
Complementary function would be : Asinx+Bcosx where,A and B are constants respectively.
If I write...
https://courses.physics.illinois.edu/phys406/Lecture_Notes/P406POM_Lecture_Notes/Derivation_of_the_Sabine_Equation.pdf
I can't understand anything from the above link.
Is there any alternative way to derive Sabine's formula. I searched in google but coundn't find anything.
B]1. Homework Statement [/B]
Find whether the series is convergent or divergent
Homework Equations
The Attempt at a Solution
By ratio test I have,
I would apply L'Hôpital's rule to find the value of limit but before that how do i simplify the expression? It has fractional part both in the...
Homework Statement
Find the general term and test the nature of the series:
Homework Equations
1+1*4+1*4*7+...
The Attempt at a Solution
Term N = Term (N-1) * 3N-2
Hence,3(N-1)-2 * 3N-2
which simplifies to (3N-5)(3N-1) = 9N^2 - 18N + 5
Is this correct?
Sn=n/2 (A1+An)
this can also be written as Sn=n/2 (A1+(A1+ (n-1)d))
which then further simplifies to: Sn=n/2 (2A1+ (n-1)d)
now plug in the known values and simplify
for your first question, the value of n=10
for your second question,
n=12,d=3,A1=2
yeah... i can write the nth term and i found that the series is convergent.
But this series:
1/4 + (1)(5)/(4)(8) + (1)(5)(9)/(4)(8)(12) + ...
The general term for the denominator is 4^n (n!)
but the numerator terms are tricky : 1*5*9
==> 1*2*3*4*5*6*7*8*9/2*3*4*6*7*8
==>9!/2*3*4*6*7*8
how...