The solutions of (a) and (b) are given:
Problem 7. (20 pts) For each of the ten sentences below, justify whether they are true...
Problem 20. Is R a subgroup of S? If so, is it a normal subgroup? Is it isomorphic to another knoun group? Definition 4.1. Let S be the set of similarity transformations of the plane. s., {f : c clf(z) #: az + b orfe) až + b for some a, b E C with a 0} Definition 4.2. Let I be the set of isometries of the plane. 1-(f : c clf(z)-az + b or f(z) az + b...
Let V = P1(R) and W = R2. Let B = (1,x) and y=((1,0), (0, 1)) be the standard ordered bases for V and W respectively. Define a linear map T:V + W by T(P(x)) = (p(0) – 2p(1), p(0) + p'(0)). (a) Let FEW* be defined by f(a,b) = a – 26. Compute T*(f). (b) Compute [T]y,ß and (T*]*,y* using the definition of the matrix of a linear transformation.
Consider the sequence of functions fn : [0,1| R where each fn is defined to be the unique piecewise linear function with domain [0, 1] whose graph passes through the points (0,0) (, n), (j,0), and (1,0) (a) Sketch the graphs of fi, f2, and f3. (b) Computefn(x) dx. (Hint: Compute the area under the graph of any fn) (c) Find a function f : [0, 1] -> R such that fn -* f pointwise, i.e. the pointwise limit of...
Decide whether each statement is true or false and explain your reasoning. Give a counter-example for false statements. The matrices A and B are n x n. a. The equation Ax b must have at least one solution for all b e R". b. IfAx-0 has only the trivial solution, then A is row equivalent to the n x p, identity matrix. c. If A is invertible, then the columns of A-1 are linearly independent. d. If A is invertible,...
Consider the sequence of functions fn : [0,1| R where each fn is defined to be the unique piecewise linear function with domain [0, 1] whose graph passes through the points (0,0) (, n), (j,0), and (1,0) (a) Sketch the graphs of fi, f2, and f3. (b) Computefn(x) dx. (Hint: Compute the area under the graph of any fn) (c) Find a function f : [0, 1] -> R such that fn -* f pointwise, i.e. the pointwise limit of...
For each statement, decide whether it is always true (T) or sometimes false (F) and write your answer clearly next to the letter before the statement. In this question, u and v are non-zero vectors in R"; W is a vector space, wi is a vector in W, and P2 is the vector space of polynomials of degree less than or equal to 2 with real coefficients. (a) The plane with normal vector u intersects every line with direction vector...
1-4. True/False [1 point each] Write a T on the line if the statement is always true, and F oth- erwise. If you determine that the statement is false, you must give justification in the space provided to receive credit Letr be a smooth vector function. If ||r(t)|| = 1 for all t, then |r(t)|| is constant _1. Let r be a smooth vector function. If ||r(t)|| = 1 for all t, then r(t) is orthgonal to r(t) for all...
Please answer all parts. Thank you!
20. Let R be a commutative ring with identity. We define a multiplicative subset of R to be a subset S such that 1 S and ab S if a, b E S. Define a relation ~ on R × S by (a, s) ~ (a, s') if there exists an s"e S such that s* (s,a-sa,) a. 0. Show that ~ is an equivalence relation on b. Let a/s denote the equivalence class...
Mark each statement True or False. Justify each answer. a. A homogeneous system of equations can be inconsistent. Choose the correct answer below. O A. True. A homogeneous equation can be written in the form Ax o, where A is an mxn matrix and 0 is the zero vector in R". Such a system Ax -0 always has at least one solution, namely x-0. Thus, a homogeneous system of O B. True. A homogeneous equation cannot be written in the...
6. Determine whether each of the following is true or false (note: the statement is true if it is always true, otherwise it is false). If you say it is true then refer to a known result or give a proof, while if you say it is false then give a counterexample, i.e., a particular case where it fails. (a) If A, B and C are independent, the Pr(AlBnc)- Pr (A) (b) The events S., A are independent (S is...