Question
Download Solution PDFयदि सभी x ∈ R के लिए x2 + 2ax + 10 - 3a > 0 हो तो
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFसंकल्पना:
ax2 + bx + c > 0 सभी x ∈ R के लिए यदि: a > 0 और b2 - 4ac < 0
गणना:
समीकरण x2 + 2ax + 10 - 3a > 0 सभी x ∈ R के लिए
⇒ (2a)2 - [4 × (10 - 3a)] < 0
⇒ 4a2 - [40 - 12a] < 0
⇒ 4a2 + 12a - 40 < 0
⇒ a2 + 3a - 10 < 0
⇒ (a + 5)(a - 2) < 0
∴ -5 < a < 2
Last updated on Jun 12, 2025
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