
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
April 21st, 2017, 12:12 AM  #1 
Newbie Joined: Apr 2017 From: london Posts: 1 Thanks: 0  Please help me write the formula
Hello, I need to formulate the follow relationship in proper math symbols: Differential in A (last day's value minus today's) has a tendency to reach the Differential in B (today's) I though this could be expressed with AΔ > BΔ But I guess there are more elegant and mathematically correct ways to do this in Maple or Mathcad? Thank you! Dave Last edited by skipjack; April 21st, 2017 at 04:35 AM. 
April 21st, 2017, 02:24 AM  #2 
Senior Member Joined: Feb 2016 From: Australia Posts: 1,397 Thanks: 479 Math Focus: Yet to find out. 
Not quite sure what you are asking. Can you give more information about A and B? Let 'last days value' = LV, and 'today's value' = TV. Then A = LV  TV, and B = TV. As you have said, you could say $\Delta A = LV  TV$. If you want to show that '$\Delta A$ approaches B', then you need to determine what causes this to happen. Or maybe, A = $V_{i  1}  V_i, \ i = 1, 2, ...$ where $i$ denotes the current day, and V is the value. 
April 21st, 2017, 04:42 AM  #3 
Global Moderator Joined: Dec 2006 Posts: 18,142 Thanks: 1417 
A definition of "tendency to reach" is needed, else any use of symbols could well be misleading.


Tags 
formula, write 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Given a>c and b>c, can I write {a,b}>c?  ga34gep  Algebra  4  May 3rd, 2016 02:37 PM 
Not sure how to write the formula.  GIjoefan1976  Algebra  3  March 16th, 2016 07:01 PM 
word problem. just not sure how to write words as a formula  GIjoefan1976  Algebra  4  February 13th, 2016 08:59 PM 
Math, use my head to calculate, or write down the formula?  bqeuux  Math  2  February 9th, 2016 09:41 AM 
ReWrite  Dukeee  Calculus  1  July 10th, 2013 07:16 AM 