Problem (1): Define the variable z as z -4.5; then evaluate (a) 0.4z'+3.12 -162.3z -80.7 (b)...
Problem 1. Consider the function f(x)- 3.12 show that f is Riemann integrable on [0.2] and use the definition to find .后f(x)dr Problem 2. Consider the function -2, zEQ 2, O f(r) = Show that f is not Riemann integrable on 0,1 but s Reemann integrable on this interval. Problem 3. (a) Let f be a real-valued function on a, b] such thatf()0 for all c, where c E [a, b Prove that f is Riemann integrable on a, b...
(1 point) Consider the wave equation 1(1)utt = uzz for-oo < z < oo, t>0 with initial conditions ut (z,0-0 and u(z,0) = /(z), where (2) f(z) = 1 for 0 < z < 1, (3) f(z) =-1 for-1 < z < 0, and (4) f(z) = 0 for all other. The slanting lines in the figure below show the characteristics for this PDE that originate on the z-axis at the points of discontinuity of the initial data f f(x)...
1. Solve the boundary value problem ut =-3uzzzz + 5uzz, u(z, 0) = r(z) (-00 < z < oo, t > 0), using direct and inverse Fourier transforms U(w,t)-홅启u(z, t) ei r dr, u(z,t)-二U( ,t) e ur d . You need to explain where you use linearity of Fourier transform and how you transform derivatives in z and in t 2. Find the Fourier transform F() of the following function f(x) and determine whether F() is a continuous function (a)...
Problem 7. (1 point) (1 pt) Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees F during the first hour after death and about 1 degree F for each additional hour. Assuming an air temperature of 66 degrees F and a living body temperature of 98.6 degrees F. the temperature Tt) in degrees F of a body at a time t hours since death is given by T(t) = 66 + 32.6e-kt...
Question 1 < Find the tangent plane to the equation z = 3.12 2y2 + 3y at the point (-4, -3, - 75) 2 Question 2 Find the tangent plane to the equation z = 5ex°-by at the point (12, 24, 5) Question 3 < > Find the tangent plane to the equation z = 5y cos(3x – 2y) at the point (2,3,15) z = Question 4 at the point (4,2,8), and use it to Find the linear approximation to...
Problem 6, (a) Define what is meant by the weight of a word x in Z (b) Define what is meant by the distance between two words r, y in Z2 (c) Prove the triangle inequality: D(, ) S D(r, y) +D(y, 2) for all words r, y, z in Zh. Problem 6, (a) Define what is meant by the weight of a word x in Z (b) Define what is meant by the distance between two words r, y...
Problem 3. (1 point) The temperature at a point (X,Y,Z) is given by T(x, y, z) = 200e-x=y+14–2–19, where T is measured in degrees Celsius and x,y, and z in meters. There are lots of places to make silly errors in this problem; just try to keep track of what needs to be a unit vector. Find the rate of change of the temperature at the point (-1, 1,-1) in the direction toward the point (-4,-5, -5). In which direction...
Consider a 2 m long metal rod. The temperature u(z,t) at a point along the rod at any time t is found by solving the heat equation k where k is the material property. The left end of the rod ( 0) is maintained at 20°C and the right end is suddenly dipped into snow (0°C). The initial temperature distribution in the rod is given by u(x,0)- (i) Use the substitution u(z,t) ta,t)+20-10z to reduce the above problem to a...
PDE’s 1. (a) Reduce the boundary value problem for 3D heat conduction with spherical symmetry u(z, y, 2, t-u(r, t f(r) is given] to the boundary value problem for 1D heat conduction in a rod with insulated latteral surface (b) Derive し2 u(r, t) = Σ Bn sin nm-e-n2 ' , where Bn=2 ,rf(r) sin nTI, dr. τ= (c) Suppose a ball (radius L-0.1) of molten aluminum (at its melting point) is dropped into freezing water Estimate how long it...
(a) Let L and L' be two lines in R3. 1:*2 =12-21 Lt -1 5 -2 -1 2-5 -4. Determine if the lines intersect at a point. If the , write down the three coordinates of the intersection point in the three boxes below. If they do not, enter the three letters D, N, E, one in each box below (for Does NotExist) (b) An insect is flying along a path r(x,y,z) = (x(t), y(t), z(t)) in a room where...