Homework Statement
find the characteristic equation of a binomial variable with pmf p(x) =\frac{n!}{(n-k)!k!}*p^{k}*(1-p)^{n-k}Homework Equations
characteristic equation
I(t) = \sump(x)*e^{tk}The Attempt at a Solution
I(t) = \sum\frac{n!}{(n-k)!k!}*(p^{k}*(1-p)^{-k}*e^{tk})*(1-p)^{n}
i am...
Homework Statement
specialize cauchy's formula to the case when z is the center of the circle and show that
f(z) = (1/2\pi)\int f(z + re^(it)) dt
integral limits are 0 to 2\pi
Homework Equations
cauchy's formula
f(z) = (1/i2*pi) \int f(\zeta)/(\xi - z) d\zeta
it is 2*pi not...
Homework Statement
part 1) draw 3(R-hat) + 3(theta-hat) + 3(phi-hat)
part 2) draw 3(r-hat) + 3(theta-hat) + 3(z-hat)
Homework Equations
The Attempt at a Solution
aren't these the same thing? just 3 in each of the x, y, and z directions in cartesian coordinates.
Homework Statement
find the transfer function H(s)
[PLAIN]http://img192.imageshack.us/img192/4204/asdwoe.jpg
Homework Equations
H(s) = Vout/Vin
done in the frequency domain so: C1 and C2 turns into 1/sC
where C1 = C2 = .1F
and R1 = R2 = 20
The Attempt at a Solution
to find the...
Homework Statement
the current through an element is i = 2t^2 - 1 Amps. if that element is a 4H inductor, what is the energy delivered to it from time t=1 to t=3.
Homework Equations
energy in an inductor is dw = Li di
The Attempt at a Solution
i = 2t^2 - 1
di = 4t dt
w = L...