Question 106Asked in BPSC TRE 3.0 (2024) Mathematics Class 11-12

The particular solution of dy/dx = −4xy², given that y(0) = 1, isdy/dx = −4xy², जबकि y(0) = 1, का विशेष हल है

dy/dx = −4xy², जबकि y(0) = 1, का विशेष हल है
  1. A(2x² + 1)y = 1(2x² + 1)y = 1
  2. B(2y² + 1)x = 1(2y² + 1)x = 1
  3. Cx² + 2y² = 1x² + 2y² = 1
  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: (A) (2x² + 1)y = 1(2x² + 1)y = 1

Explanation

Separate variables: dy/y² = −4x dx, so −1/y = −2x² + c. With y(0) = 1, c = −1, giving 1/y = 2x² + 1, i.e. (2x² + 1)y = 1.चरों को पृथक करें: dy/y² = −4x dx, इसलिए −1/y = −2x² + c। y(0) = 1 से c = −1, अतः 1/y = 2x² + 1, अर्थात् (2x² + 1)y = 1।

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

This is question 106 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.