Question 104Asked in BPSC TRE 3.0 (2024) Mathematics Class 11-12

Solution of the differential equation dy/dx − y/x = 2x², isअवकल समीकरण dy/dx − y/x = 2x² का हल है

अवकल समीकरण dy/dx − y/x = 2x² का हल है
  1. Ay = x² + cy = x² + c
  2. By = x + cy = x + c
  3. Cy = x³ + cxy = x³ + cx
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (C) y = x³ + cxy = x³ + cx

Explanation

This is linear with P = −1/x, so the integrating factor is e^(−log x) = 1/x. Then d(y/x)/dx = 2x, so y/x = x² + c and y = x³ + cx.यह रैखिक समीकरण है जिसमें P = −1/x, इसलिए समाकलन गुणक e^(−log x) = 1/x है। तब d(y/x)/dx = 2x, अतः y/x = x² + c और y = x³ + cx।

From BPSC TRE 3.0 (2024) Mathematics Class 11-12 — Previous Year Paper

This is question 104 of BPSC TRE 3.0 (2024) Mathematics Class 11-12 — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.