11. (10 points) Let f(t) be a 27-periodic function defined by f(t) = -{ 2 if – <t<0, -2 if 0 <t<, f(t + 2) = f(t). a) Find the Fourier series of f(t). b) What is the sum of the Fourier series of f at t = /2.
Use Definition 7.1.1. DEFINITION 7.1.1 Laplace Transform Let f be a function defined for t > 0. Then the integral L{f(t)} e-stf(t) dt 0 is said to be the Laplace transform of f, provided that the integral converges. Find L{f(t)}. (Write your answer as a function of s.) L{f(t)} = (s > 0) f(t) 4 (2, 2) 1
9. La ste) defined as follows 9. Let f(x) defined as follows: f(x) = 0 if x < -1 = 2(x + 1)/27 if - 1<x<2 = 2/9 if 2 < x < 5 = 0 otherwise. Find F(u) = f(x)dx, where u E R.
Let if x<o if o sxs1 <xs 2 f(x) = O NO 2 - X lif O VIVA x and g(x) = f(t) dt JO (a) Find an expression for g(x) similar to the one for f(x). if x < 0 if o sxs 1 g(x) = 3 if 1 < x 2 if x > 2 (6) Sketch the graph of f. Sketch the graph of g. (c) Where is differentiable? (Enter your answer using interval notation.) Where is...
Let f and g be differentiable on R such that f(1) = g(1), and f'(x) < '() for all r ER. Prove that f(x) = g(2) for 3 >1.
please answer both questions
3. A function f(t) defined on an interval 0 <t<L is given. Find the Fourier cosine and sine series of f. f() = 6(1-1),0 <t< 4. Find the steady state periodic solution, *xp(t) of the following differential equation. *" + 5x = F(t), where FC) is the function of period 2nt such that F(t) = 18 if 0 << < 1 and F(t) = -18 if t <t <200.
1. Let X be a continuous random variable with probability density function f(x) = { if x > 2 otherwise 0 Check that f(-x) is indeed a probability density function. Find P(X > 5) and E[X]. 2. Let X be a continuous random variable with probability density function f(x) = = { SE otherwise where c is a constant. Find c, and E[X].
Use Definition 7.1.1. DEFINITION 7.1.1 Laplace Transform Let f be a function defined for t > 0. Then the integral Kf(t)} = [e-stf(t) dt is said to be the Laplace transform of f, provided that the integral converges. Find L{f(t)}. (Write your answer as a function of s.) f(t) = {6. Ost<3 PROI} = (s > 0)
The Laplace transform of the plecewise continuous function f(t) = S4, 0<t<3 12, t> 3 Is given by [{f} = { (3 – e-"), o>0. None of them 1 [{f} = (1 – 2e-4), 8>0. 0 [11] = (1 – 3e-4), 0> 0. ° L{f} = { (2–e=4), o>0.
Let X and Y be continuous random variables with joint distribution function: f(x,y) = { ** 0 <y < x <1 otherwise What is the P(X+Y < 1)?