Question
Download Solution PDFजर α आणि β ही 2x2 - 3x - 5 = 0 या समीकरणाची मुळे असतील, तर \(\frac{\alpha}{\beta}\) आणि \(\frac{\beta}{\alpha}\) मुळे असलेले समीकरण कोणते?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFदिलेले आहे:
α आणि β ही 2x2 - 3x - 5 = 0 या समीकरणाची मुळे आहेत.
\(\frac{\alpha}{\beta}\) आणि \(\frac{\beta}{\alpha}\) ही दुसऱ्या समीकरणाची मुळे आहेत.
गणना:
α आणि β ची मूल्ये शोधण्यासाठी दिलेल्या समीकरणावर, हिट अँड ट्रायल पद्धत वापरून,
2x2 - 3x - 5 = 0
= 2x2 - 5x + 2x - 5
= x(2x - 5) +1(2x - 5)
= (2x - 5)(x + 1)
x = \(\frac{5}{2}\) आणि x = -1
अशा प्रकारे α = \(\frac{5}{2}\) आणि β = -1
आता \(\frac{\alpha}{\beta}\) आणि \(\frac{\beta}{\alpha}\) साठी सोडवल्यास, आपल्याकडे,
\(\frac{\alpha}{\beta}\) = \(\frac{-5}{2}\)
\(\frac{\beta}{\alpha}\) = \(\frac{-2}{5}\)
आता,
\(\frac{\alpha}{\beta}\) आणि \(\frac{\beta}{\alpha}\) मुळे असलेले समीकरण:
(x - (\(\frac{-5}{2}\))) (x - (\(\frac{-2}{5}\))) = 0
⇒ (x + 5/2) (x + 2/5) = 0
⇒ x2 + 5x/2 + 2x/5 + 1 = 0
⇒ (10x2 + 25x + 4x + 10)/10 = 0
⇒ 10x2 + 29x + 10 = 0
म्हणून, पर्याय (2) योग्य आहे.
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