For which value of the constant A the differential equation (2xy + 3) dx + (4Ax² - 9y) dy = 0 is exact? Select one: ○ 2 none of these O 4 ○ 1/4 ○ 3/2

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A: The solution for the above question is same as shown below.

Q: 4. Solving the following difference equations a. 2xn - 5xn-1 = 0, x0 = 2. b. 29n5qn-1 = 3,90 = 3. c.…

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