Question
Download Solution PDFకింది వాటిలో సరైనది ఏది?
I.
II.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFఇచ్చినది:
k + 1/k = 12
ఉపయోగించిన సూత్రం:
(x + 1/x)2 = (x2 + 1/x2) + 2
(a - b)(a + b) = a2 - b2
గణన:
మొదటి ప్రకటన తీసుకోండి
k + 1/k = 12
ఉపయోగించండి
(x + 1/x)2 = (x2 + 1/x2) + 2
(k2 + 1/k2) = 144 - 2
(k2 + 1/k2) = =142
కాబట్టి, మొదటి ప్రకటన నిజం.
రెండో ప్రకటన తీసుకోండి
ఉపయోగించండి (a - b)(a + b) = a2 - b2
కాబట్టి, రెండవ ప్రకటన నిజం కాదు.
అందువల్ల, ప్రకటన I మాత్రమే నిజం.
∴ ఎంపిక 1 సరైన సమాధానం.
Mistake Points
ఇది గమనించండి,
(K4)2 = K4 * 2 = K8
కాబట్టి, ప్రకటన రెండు సరైనది కాదు.
Last updated on Jul 19, 2025
-> The SSC CGL Notification 2025 has been announced for 14,582 vacancies of various Group B and C posts across central government departments.
-> CSIR NET City Intimation Slip 2025 has been released @csirnet.nta.ac.in.
-> The SSC CGL Tier 1 exam is scheduled to take place from 13th to 30th August 2025 in multiple shifts.
-> Aspirants should visit the official website @ssc.gov.in 2025 regularly for CGL Exam updates and latest announcements.
-> Candidates had filled out the SSC CGL Application Form from 9 June to 5 July, 2025. Now, 20 lakh+ candidates will be writing the SSC CGL 2025 Exam on the scheduled exam date. Download SSC Calendar 2025-25!
-> In the SSC CGL 2025 Notification, vacancies for two new posts, namely, "Section Head" and "Office Superintendent" have been announced.
-> Candidates can refer to the CGL Syllabus for a better understanding of the exam structure and pattern.
-> The CGL Eligibility is a bachelor’s degree in any discipline, with the age limit varying from post to post.
-> The SSC CGL Salary structure varies by post, with entry-level posts starting at Pay Level-4 (Rs. 25,500 to 81,100/-) and going up to Pay Level-7 (Rs. 44,900 to 1,42,400/-).
-> Attempt SSC CGL Free English Mock Test and SSC CGL Current Affairs Mock Test.