My Math Forum  

Go Back   My Math Forum > College Math Forum > Calculus

Calculus Calculus Math Forum

Thanks Tree2Thanks
  • 2 Post By romsek
LinkBack Thread Tools Display Modes
April 25th, 2019, 03:17 AM   #1
Joined: Apr 2019
From: Israel

Posts: 1
Thanks: 0

Help is needed

There is this question that I can't solve.
Please help me
many thanks question 30c.jpg
ronrong7 is offline  
April 25th, 2019, 08:34 AM   #2
Senior Member
romsek's Avatar
Joined: Sep 2015
From: USA

Posts: 2,552
Thanks: 1402

I don't see how it's possible for this positive series to be simultaneously monotonically decreasing
and yet be that $\lim \limits_{n\to \infty}\left(\dfrac{a_{n+1}}{a_n}\right)=5$

If it's monotonically decreasing $\dfrac{a_{n+1}}{a_n}<1,~\forall n$
Thanks from topsquark and Greens
romsek is offline  

  My Math Forum > College Math Forum > Calculus


Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
help needed alicemaria Linear Algebra 1 November 16th, 2016 04:54 AM
Help needed saeed Trigonometry 1 October 22nd, 2015 12:33 PM
help needed! cfg Algebra 8 August 21st, 2013 12:47 AM
Help needed! lilwayne Calculus 9 October 22nd, 2010 06:50 AM
Help needed mohit.choudhary Advanced Statistics 3 June 11th, 2009 01:52 PM

Copyright © 2019 My Math Forum. All rights reserved.