Question
Download Solution PDFఒకవేళ x2 – x – 1 = 0 సమీకరణం యొక్క మూలాలు α మరియు β అయితే, అపుడు ఏ సమీకరణానికి మూలాలు α/β మరియు β/α అవుతాయి:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFα మరియు β x2 – x – 1 = 0 సమీకరణం యొక్క మూలాలు కాబట్టి, అపుడు
⇒ α + β = -(-1) = 1
⇒ αβ = -1
ఇప్పుడు, (α / β) మరియు (β / α) మూలాలు అయితే,
⇒ మూలాల మొత్తం = (α/β) + (β/α) = (α2 + β2)/αβ = {(α + β)2 – 2αβ}/αβ = {(1)2 – 2(-1)}/(-1) = -3
⇒ మూలాల లబ్దం = (α/β) × (β/α) = 1
ఇప్పుడు, అప్పుడు సమీకరణం,
⇒ x2 – (మూలాల మొత్తం)x + మూలాల లబ్దం = 0
⇒ x2 – (-3)x + (1) = 0
⇒ x2 + 3x + 1 = 0Last updated on Jul 18, 2025
-> A total of 1,08,22,423 applications have been received for the RRB Group D Exam 2025.
-> The RRB Group D Exam Date will be announced on the official website. It is expected that the Group D Exam will be conducted in August-September 2025.
-> The RRB Group D Admit Card 2025 will be released 4 days before the exam date.
-> The RRB Group D Recruitment 2025 Notification was released for 32438 vacancies of various level 1 posts like Assistant Pointsman, Track Maintainer (Grade-IV), Assistant, S&T, etc.
-> The minimum educational qualification for RRB Group D Recruitment (Level-1 posts) has been updated to have at least a 10th pass, ITI, or an equivalent qualification, or a NAC granted by the NCVT.
-> Check the latest RRB Group D Syllabus 2025, along with Exam Pattern.
-> The selection of the candidates is based on the CBT, Physical Test, and Document Verification.
-> Prepare for the exam with RRB Group D Previous Year Papers.