Find the integrating factor of y dx − (x + 2y²) dy = 0.
Find the integrating factor of y dx − (x + 2y²) dy = 0.
- A. y
- B. 1/y
- C. y²
- D. 1/y²
Answer: B) 1/y
Explanation: Divide by y dy: dx/dy − x/y = 2y. This is a linear DE of the form dx/dy + Px = Q with P = −1/y. IF = e^(∫(−1/y)dy) = e^(−log y) = 1/y.
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