Shashank posted an Question
November 24, 2020 • 19:53 pm 30 points
  • IIT JAM
  • Mathematics (MA)

If f(x) = x sin x for all x belong to r then f: r-> r is (a) bounded above (b) not bounded above (c) bounded below (d) not bounded below

2 Answer(s) Answer Now
  • 0 Likes
  • 3 Comments
  • 0 Shares
  • comment-profile-img>
    Satpal singh Best Answer

    see the attachment

    cropped3578149968476185149.jpg
    eduncle-logo-app

    Satpal sir how did you know that if you multiply the inequality the inequality doesn't change because "x" could be + or -?

    eduncle-logo-app

    you can consider both the cases x>0 , x<0

    eduncle-logo-app

    you will get xsinx lies between these two lines

  • comment-profile-img>
    Deepak singh 1

    not bounded above nor bounded below .. option b and d are correct

    cropped880539785551490785.jpg
whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncle’s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers