Testbook Logo
Exams SuperCoaching Test Series Skill Academy
More
Malayalam
English
Hindi
Telugu
Bengali
Marathi

Question

Download Solution PDF

x2 - 7x + 1 = 0 ആണെങ്കിൽ (x + 1/x)ൻ്റെ മൂല്യം കണ്ടെത്തുക.

  1. 3
  2. 7
  3. -7
  4. -3

Answer (Detailed Solution Below)

Option 2 : 7
Free Tests
View all Free tests >
Free
RRB NTPC Graduate Level Full Test - 01
2.5 Lakh Users
100 Questions 100 Marks 90 Mins
Start Now

Detailed Solution

Download Solution PDF

നൽകിയിരിക്കുന്നത്:

x2 - 7x + 1 = 0

കണക്ക് കൂട്ടൽ:

x2 - 7x + 1 = 0

x കൊണ്ട് ഹരിക്കുമ്പോൾ:

⇒ x - 7 + 1/x = 0

⇒ x + 1/x = 7

∴ x + 1/x  ൻ്റെ മൂല്യം = 7 
Download Solution PDF
Latest RRB NTPC Updates

Last updated on Jul 23, 2025

-> RRB NTPC Undergraduate Exam 2025 will be conducted from 7th August 2025 to 8th September 2025. 

-> The RRB NTPC UG Admit Card 2025 will be released on 3rd August 2025 at its official website.

-> The RRB NTPC City Intimation Slip 2025 will be available for candidates from 29th July 2025. 

-> Check the Latest RRB NTPC Syllabus 2025 for Undergraduate and Graduate Posts. 

-> The RRB NTPC 2025 Notification was released for a total of 11558 vacancies. A total of 3445 Vacancies have been announced for Undergraduate posts while a total of 8114 vacancies are announced for Graduate-level posts in the Non-Technical Popular Categories (NTPC).

-> Prepare for the exam using RRB NTPC Previous Year Papers.

->  HPTET Answer Key 2025 has been released on its official site

More Linear Equation in 1 Variable Questions

Q1. A student got twice as many sums wrong as he got right. If he attempted 48 sums in all, how many sums did he solve correctly?
Q2. A man has Rs . 960 in denominations of one rupee coins , five rupee coins and ten rupee coins . The number of coins in each denomination is equal . What is the total number of coins
Q3.If x = 5 + \(2\sqrt{6}\), then \(\frac{(x-1)}{\sqrt{x}}\) is equal to
Q4.What would be the minimum number of notes for Rs 4849 if notes are available only in denominations of Rs 2, 5, 20, 50, 500? 
Q5.Raju has Rs. 11,000 and starts saving Rs. 5,000 each week towards buying a new laptop. At the same time, Ramesh has Rs. 60,000 and begins spending Rs. 2,000 per week on supplies for his art class. Will there be a week when they have the same amount of money?
Q6.The sum of the five consecutive even numbers is 2720. The sum of the third and fifth numbers is:
Q7.8 apples and 10 oranges weigh 5 kg. 12 apples and 20 oranges weigh 9 kg. What is the weight (in kg, rounded off to the nearest integer) of 15 apples and 24 oranges?
Q8.Arun is three years older than Varun. Eight years ago, \(\frac{5}{6}\)th of Arun's age exceeded \(\frac{3}{5}\)th of Varun's age by 6 years. If the present age of Varun is x years, then the value of x can be determined by solving the equation:
Q9.A Yogi was born in 1840 B.C. He had lived one-third of his life as a boy, one- fifth of his life as a youth, one-fourth of his life as a man and the remaining 39 years as an old man. Which B.C. year did he die?
Q10.In an entrance exam, a student has to attempt 250 questions in 4 hours. Out of these 250 questions, 50 questions are on Quantitative Ability (QA). How many minutes should be spent on QA section if his mentor has suggested him that he must spend twice as much time on each QA problem as spent for every other question?

More Algebra Questions

Q1.In the equation \(3x^2−12x+b=0\) with equal roots, if the positions of b and 12 are interchanged, then the roots of the new equation are ____.
Q2.Write the expanded form of \((5a+4b+3c)^2.\)
Q3.A bag contains a total of 40 coins. Among them Rs. 5 and Rs. 10 coins and all together make the total amount Rs. 310. What is the difference between the denomination of all Rs. 10 coins and the denomination of all Rs. 5 coins?
Q4.If abc = 1, then \( \rm \frac{1}{1+a+b^{-1}}+\frac{1}{1+b+c^{-1}}+\frac{1}{1+c+a^{-1}}\)
Q5.If both the roots of the quadratic equation (2p + 1) x2 + (3p + 2)x + (p+1) = 0 and (6p + 1)x2 + 9px + 3p - 1 = 0 are common, then what is the value of p2 +3p-1?
Q6.Write the expanded form of (7a + 9b + 6c)2
Q7. A student got twice as many sums wrong as he got right. If he attempted 48 sums in all, how many sums did he solve correctly?
Q8. A man has Rs . 960 in denominations of one rupee coins , five rupee coins and ten rupee coins . The number of coins in each denomination is equal . What is the total number of coins
Q9.If \(\sqrt{(a)^b}=a^2+5b\), then possible value of a & b will be _____.
Q10.If a2 + b2 = 130 and ab = 63, then (a + b)2 is ____
Crack Super Pass Live with
India's Super Teachers
Explore Supercoaching For FREE
Suggested Test Series
View All >
RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2)
2341 Total Tests with 3 Free Tests
Start Free Test
Current Affairs (CA) 2025 Mega Pack for SSC/Railways/State Exam Mock Test
431 Total Tests with   1 Free Tests
Start Free Test
Suggested Exams
Exam-Logo
RRB NTPC

RRB NTPC Important Links

More Quantitative Aptitude Questions

Q1.Perimeter of a rectangular field is equal to the perimeter of a triangular field whose sides are in the ratio 3:2:4 respectively. lf area of rectangular field is 500 m2 and sides are in the ratio 5:4 respectively, then calculate the longer side of the triangular field.
Q2.A cistern has an inlet pipe and an outlet pipe. Inlet pipe can fill three-fourth of the cistern in 24 minutes while outlet pipe can empty the one-third filled cistern in 16 minutes. If both the pipes are opened together, then the cistern will be completely filled in-
Q3.In a family, three sons were born for every 3 years one after the other. If the ratio of present ages of father and the eldest son is 15:7 and the average of the present ages of the 3 sons is 18 years. What will be the ratio of the ages of the father and the youngest son after 5 years?
Q4.Train A of length 80m while moving crosses a pole in 16 seconds. lf it is known that the lengths of train B and train A is in the ratio of 3:1, then how long would it take train B to cross a platform which is half the length of train A if the speed of train B is same as that of train A?
Q5.Can A and Can B contain a mixture of soda and water in the ratio of 5 : 3 and 7 : 2 respectively If soda and water are taken out in the ratio of P : Q from can A and B respectively to form a new mixture in which the ratio of soda and water is 12 : 5 respectively, then find the value Of P:Q?
Q6.A boat can covers a certain distance in upstream and same distance in downstream in total of 7 hours 48 minutes, If upstream speed of the boat is 62.5%. of downstream speed of the boat and speed of the stream is 3 km/h, what is the total distance covered by the boat?
Q7.M and R went for shopping and bought two sarees each at different cost. Cost price of saree bought by R is Rs.250 more than the cost price of saree bought by M. Shopkeeper earned a profit of 20% on selling both the sarees together to R and M which he bought them at total Rs.6000. At what cost did M buy saree?
Q8.There are three numbers m, n, and p, such that sum of m and n is 144, sum of thrice of n and five times of p is 464, and sum of p and m is 160, then what is the value of p?
Q9.While calculating average marks of 60 students, the two digits of original marks of a student are written reversed and thereby average of marks is increased by 0.6 Find the difference between the two digits of marks of the student?  
Q10.Simple interest received on a certain sum at a rate of simple interest of 5% for 2 years is Rs.780. If the rate of interest remains same, what will be the total amount at the time of withdrawal at the end of 5 years.  
Exams
Cut Off
Eligibility
Coaching
Previous Year Papers
Syllabus
Test Series
Important Exams
Super Coaching
Testbook USA SAT Exam
Testbook USA ACT Exam
US College Admissions Guide
Testbook Edu Solutions Pvt. Ltd.
1st & 2nd Floor, Zion Building,
Plot No. 273, Sector 10, Kharghar,
Navi Mumbai - 410210
[email protected]
Toll Free:1800 833 0800
Office Hours: 10 AM to 7 PM (all 7 days)
Company
About usCareers We are hiringTeach Online on TestbookPartnersMediaSitemap
Products
Test SeriesTestbook PassOnline CoursesOnline VideosPracticeBlogRefer & EarnBooks
Our Apps
Follow us on
Copyright © 2014-2022 Testbook Edu Solutions Pvt. Ltd.: All rights reserved
User PolicyTermsPrivacy
Get Free Access Now
Hot Links： all teen patti game real cash teen patti teen patti master official rummy teen patti