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For Problems 7–21, verify that the given function is a solution to the given
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Differential Equations and Linear Algebra (4th Edition)
- If y = x² - xy + 1, then when 0-1/1/201 01/1/20 0-1 0-2 O nonexistent -1, dis =arrow_forwardThe differential equation (1+ 2) (dy – dr) - 2rydz for y (0) =1 can be transformed to a standard form; dy A. = 1 (1-2) C. dr - 2xy (1 + r) = 1 D. + 2ry (1 + ) 1 A. B.arrow_forwardSolve the following differential equation properly.arrow_forward
- Am.800.arrow_forward. Determine solutions x and y for the following system of differential equations. (express x and y as a functions of t) { x² - x' - 2x - y = 0 lx-y' + 2y = e²tarrow_forward4.10) my professor says I have to explain the steps in the solved problems in the picture. Not just copy eveything down from the text.arrow_forward
- Please write legiblyarrow_forwardSuppose that r1 and r2 are roots of ar2 + br + c = 0 and that r1 ≠ r2; then exp(r1t) and exp(r2t) are solutions of the differential equation ay″ + by′ + cy = 0. Show that ϕ(t; r1, r2) = (exp(r2t) − exp(r1t))/(r2 − r1) is also a solution of the equation for r2 ≠ r1. Then think of r1 as fixed, and use l’Hôpital’s rule to evaluate the limit of ϕ(t; r1, r2) as r2 → r1, thereby obtaining the second solution in the case of equal roots.arrow_forwardThe indicated function y1(x) is a solution of the given differential equation. Use reduction of order or formula (5) in Section 4.2, as instructed, to find a second solution y2(x).arrow_forward
- The solution of the differential equation dy x2 dx? dy + y = log x is dx 1. y = (c1 + c2x) log x + 2 log x + 3 2. y = (c1 + c2x2) log x + log x + 2 3. y = (c1 + c2X) log x + log x + 2 4. y = (c1 + c2 log x) x + log x + 2arrow_forwardChoose from the choices below the equation and solve using a complete solution.arrow_forwardLet the rate of growth dN/dt of a colony of bacteria be proportional to the square root of the number present at any time. If there are no bacteria present at t = 0, how many are there at a later time? Observe here that the routine separation of variables solution gives an unreasonable answer, and the correct answer, N ≡ 0, is not obtainable from the routine solution. (You have to think, not just follow rules!)arrow_forward
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