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(3) Consider f: R3- R3 defined by (u,, w)-f(r, y, :) where u=x w = 3~. Let A = {1 < x < 2, 0 < xy < 2, 0 < z < 1). Write down (i) the derivative Df as a matrix (ii) the Jacobian determinant, (ii) sketch A in (x, y. :)-space, and iv) sketch f(A) in (u. v, w)-space.
2. Let U be an open subset of R and let A be a compact subset of U. Suppose that f: U R is a iction of class C() aud let F-(()e KIf(r, y) 0 and that Df does not vatish on E. Investigate whether Dis a Jordan region. annc
Let U be an open subset of R. Let f: U C Rn → Rm. (a) Prove that f is continuously differentiable if and only if for each a є U, for each E > 0, there exists δ > 0 such that for each x E U, if IIx-all < δ, then llDf(x)-Df(a) ll < ε. (b) Let m n. Prove that if f is continuously differentiable, a E U, and Df (a) is invertible, then there exists δ...
The polar equation r = θ defines a spiral in the xy-plane. Let C be the portion of this spiral starting at (x, y) = (−3π, 0) and ending at (x, y) = (0, 0). Let F(x, y) = < (y − 1)^e cos(x−xy) sin(x − xy), xe^cos(x−xy) sin(x − xy) > Find Z C F · dr
3. If z = f(x,y), where x = r cos, y=r sin 0 show that 222 222 1 222 1.az + + +) ar2 ду? ar2 a02 rar
Let F = (x,y) and C be the triangle with vertices (0,5) and (3,0) oriented counterclockwise. Evaluate 9. Fodr by parameterizing C. Use a parametric description of C and set up the integral. 1 $ F•dr=So dt 0 Choose the correct answer below and, if necessary, fill in the answer box to complete your choice. of O A. For F = (f,g), evaluating the integral using дх дg and ду = results in a nonzero value of og OB. For...
Let U ⊆ R^n be open (not necessarily bounded), let f, g : U → R
be continuous, and suppose that |f(x)| ≤ g(x) for all x ∈ U. Show
that if
exists, then so does
.
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2. Let f(x,y) = e-r-u, 0 < x < oo, 0 < y < oo, zero elsewhere, be the pdf of X and Y. Then if Z = X + Y, compute (a) P(Z 0). (b) P(Z 6) (c) P(Z 2) (d) What is the pdf of Z?
(1 point) 5x2 — 5у, v %3D 4х + Зу, f(u, U) sin u cos v,u = Let z = = and put g(x, y) = (u(x, y), v(x, y). The derivative matrix D(f ° g)(x, y) (Leaving your answer in terms of u, v, x, y ) (1 point) Evaluate d r(g(t)) using the Chain Rule: r() %3D (ё. e*, -9), g(0) 3t 6 = rg() = dt g(u, v, w) and u(r, s), v(r, s), w(r, s). How...
Let U be an open subset of R". Let f: UCR" ->Rm. (a) Prove that f is continuously differentiable if and only if for each a e U, for eache > 0, there exists o > 0 such that for each xe U, if ||x - a| << ô, then |Df (x) Df(a)| < e.