अवकल समीकरण \(\rm y \frac {dy}{dx} \) = x + 1 का समाधान _____ है। 

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  1. y2 - x2 + 2x - c = 0
  2. y2 + x2 - 2x - c = 0
  3. y2 - x2 - 2x - c = 0
  4. इनमें से कोई नहीं

Answer (Detailed Solution Below)

Option 3 : y2 - x2 - 2x - c = 0
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गणना:

दिया गया है कि: \(\rm y \frac {dy}{dx} = x + 1\)

⇒ ydy = (x + 1) dx

दोनों पक्षों का समाकलन करने पर, हमें मिलता है

⇒ ∫ ydy = ∫ (x + 1) dx

\(\rm \frac {y^2}{2} = \rm \frac {x^2}{2} + x + c \)

⇒ y 2 = x 2 + 2x + 2c

∴ y2 - x2 - 2x - c = 0

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