Mathematics, 12.03.2020 06:07, brighamc23
1. For each equation in the following list, determine the set of initial conditions for which the Existence and Uniqueness Theorem guarantees a unique solution. (a) x? = kx (b) x? = sin x (c) x? = t / x (d) x? = cos t + x^3 ? x 2. Let x? = x^(1/3) (a) Show that the hypotheses of the Existence and uniqueness theorem do not hold in any box around the initial point (0, 0). (b) Using an argument similar to that for Torricelli�s law, construct a set of distinct solution curves that all satisfy the initial condition x(0) = 0. (c) Can you prove that the IVP x(0) = 1 has a unique solution? (d) Let x(t0) = x0 ?= 0. Show that the hypotheses of the Existence and uniqueness theorem are satsified if S is a sufficiently small box around (t0,x0). Conclude that the IVP has a unique solution as long as the solu- tion curve lies in S. Find the explicit form of the solution. 3. Let x? = x^2. Show that the hypotheses of the Existence and uniqueness theorem are satisfied for the initial condition x(0) = 1. Calculate the solution and determine the time of the singularity for the solution. Does this contradict the theorem? 4. Let x? =?sqrt(x) with x(0)=2. (a) Show that there exists a unique solution for this initial value problem. (b) Find an explicit solution for the IVP. ??(c) Notice that x1(t) = (sqrt(2) - t/2)^2 0<= t <= sqrt(8) x1(t) = 0 t>sqrt(8) and x2(t) = ( sqrt(2) -t/2 )^2 are two different functions that both seem to solve the differential equation and that both go through the initial point. Does the existence of these two functions imply that the IVP has more than one solution? Explain.
Answers: 1
Mathematics, 21.06.2019 17:00, SoccerHalo
16. you're planning to buy a boat, a motor, and some miscellaneous boating equipment. the boat costs $325, the motor costs $225, and the equipment costs $79. if you've saved $438 toward these purchases, how much more do you need to save? a. $181 b. $281 c. $291 d. $191
Answers: 3
Mathematics, 21.06.2019 21:30, unknowntay04
Which equation shows the variable terms isolated on one side and the constant terms isolated on the other side for the equation -1/2x+3=4-1/4x? a. -1/4x=1 b. -3/4x=1 c. 7=1/4x d. 7=3/4x
Answers: 1
1. For each equation in the following list, determine the set of initial conditions for which the Ex...
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