3. Which of the following equations is exact? A. (x2 + 1)dx + xydy = 0...

 

Transcribed Image Text:

3. Which of the following equations is exact? A. (x2 + 1)dx + xydy = 0 В. zdу + (За — 2у)dar 3D0 C. 2rydy – (2+ x²)dx = 0 D. x2ydy – ydx = 0. %3D 4. Solve the differential equation: xy (2y – 1) = y(1 – x). A. In(xy) = 2(x – y) +c | В. In(ту) — х — 2у + с C. In(xy) = 2x – y +c D. In(xy) = x + 2y + c 3. Which of the following equations is exact? A. (x2 + 1)dx + xydy = 0 В. zdу + (За — 2у)dar 3D0 C. 2rydy – (2+ x²)dx = 0 D. x2ydy – ydx = 0. %3D 4. Solve the differential equation: xy (2y – 1) = y(1 – x). A. In(xy) = 2(x – y) +c | В. In(ту) — х — 2у + с C. In(xy) = 2x – y +c D. In(xy) = x + 2y + c