Finding the Radius of Convergence In Exercises 39 and 40, find the radius of convergence of the power series, where c > 0 and k is a positive integer. ∑ n = 0 ∞ ( n ! ) k x n ( k n ) !
Finding the Radius of Convergence In Exercises 39 and 40, find the radius of convergence of the power series, where c > 0 and k is a positive integer. ∑ n = 0 ∞ ( n ! ) k x n ( k n ) !
Solution Summary: The author calculates the radius of convergentness of the power series displaystyle undersetn=0.
2.
Let (, F, P) be a probability space. Let X, Y be two independent ran-
dom variables such that
1
3
P(X = 0)
P(X = 1)
P(X = 2)
P(X = 3)
P(X = 4)
10
10
5'
3
P(Y = 0)
P(Y = 1)
10
1
10
7
1
P(Y2) =
P(Y = 3)
,
P(Y = 4)
10
20
20
(i) Find the probability generation function Gx(s) and Gy(s) of X and
Y, respectively.
[12 Marks]
(ii) Using Gx(s) and Gy(s), find the mean and variance of X and Y.
[12 Marks]
(iii) Find the probability generating function Gx+y(s) of X + Y.
[8 Marks]
3. (i) Using the definition of the line integral of a vector field, calculate the
line integral
L³
F.dy
of the vector field F: R² → R² given by
F(x, y) = (y, x),
and where the curve & is the unit semi-circle centred at the origin, located in
the upper half-plane and oriented in the anticlockwise direction.
Hint. Represent the curve y as the join of two curves y = 71 + 1/2 (see Example 8.9
in the Notes).
[20 Marks]
(ii) Calculate the same integral using Green's Theorem.
[10 Marks]
1. Evaluate the integral
↓ f(x, y)dxdy,
of function f R² →R over the domain DC R2, where:
f(x, y) = 2x + y
and D is the is the triangle with vertices (0, -1), (1,0) and (0,2).
Hint. Represent D in the form D = {(x, y) = R² : x = (a, b), g(x) < y < h(x)} for
some a
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