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SR. TEACHER (SEC. EDU.) COMP. EXAM 2025 2026 question with answer

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Question 141

Q141.यदि दीर्घवृत्त x²/a² + y²/b² = 1 की उत्केन्द्रता 1/2 हो तथा x = 4 इसकी एक नियता हो, तो ab का मान है —