\(\sqrt2\)x² - 2\(\sqrt5\)x + \(\sqrt3\)  = 0 के मूलों का योग है: 

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RRB Group D 30 Aug 2022 Shift 3 Official Paper
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  1. -2\(\sqrt5\)
  2. 5\(\sqrt2\)
  3. \(-\sqrt{10}\)
  4. \(\sqrt{10}\)

Answer (Detailed Solution Below)

Option 4 : \(\sqrt{10}\)
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प्रयुक्त अवधारणा:

यदि एक द्विघात समीकरण (ax 2  + bx + c = 0) है। 

तब, मूलों का योग = -b/a 

जहाँ b = x का गुणांक 

=   x2का गुणांक

गणना:

यहाँ, \(\sqrt2\)x2 - 2\(\sqrt5\)x + \(\sqrt3\) = 0 

अब, समीकरण को  \(\sqrt2\)  से विभाजित करें

⇒ x2 - \(\sqrt2\) × \(\sqrt5\) x + \(\sqrt3\over\sqrt2\) = 0 

अब, यह ax 2  + bx + c = 0  के रूप में है

जहां, a= 1 , b = -\(\sqrt{10}\) , c = \(\sqrt3\over \sqrt2\) 

अब, जैसा कि हम जानते हैं कि मूलों का योग = -b/a

⇒ -b/a = - ( -\(\sqrt{10}\) ) = \(\sqrt{10}\) 

अत: मूलों का अभीष्ट योग \(\sqrt{10}\) है। 

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