
Calculus Calculus Math Forum 
 LinkBack  Thread Tools  Display Modes 
October 29th, 2009, 04:22 PM  #1 
Newbie Joined: Sep 2009 From: saskatoon Posts: 20 Thanks: 0  should i apply the product rule or quotient rule?
alright, so im attempting this question here...and i've tried it both ways..but am not ending up with the same answer, so am i way off ? find the derivitave of y = 2x^3/(4x1)^4 (2x^3)(4x1)^4 (6x^2)(4x1)^4 +( 2x^3)(4) or 2x^3(4x1)^4 (4)8x^3(4x1)^5 or a combination of quotient rule and the general power rule (6x^2)(4x1)^4(4)(4x1)^3  (2x^3)(4)(2x^3) ugh i think im lost, any tips would be great, thanks! 
October 29th, 2009, 05:03 PM  #2 
Member Joined: Oct 2009 Posts: 52 Thanks: 0  Re: should i apply the product rule or quotient rule?
The product rule and quotient rule should yield the same answer under ANY circumstances. Using product rule, we have Simplying it further will give you the answer Using quotient rule, we have Simplying it further will give you the same answer Cheers 
October 29th, 2009, 05:24 PM  #3 
Newbie Joined: Sep 2009 From: saskatoon Posts: 20 Thanks: 0  Re: should i apply the product rule or quotient rule?
just a question tho... during the product rule when you listed 6x^2(4x1)^4  8x^3(4x1)^5 ( dont you need to multiply this by the derivitave of (4x1)^4..which would be 4? i know you multipied this by 4 already..because of the general power rule..but i thought you had to also multiply it by the derivitave of (4x1)^4 when using that power rule. hope that wasnt too confusing, thanks! only reason im following that " rule is because if y = (3x4)^6 and the derivitave ofthat is 6(3x4)^5(3) = 18(3x4)^5 ...and i see you didnt use that chain rule in that question, i know im wrong, im jsut curious what you did. 
October 29th, 2009, 10:58 PM  #4 
Member Joined: Oct 2009 Posts: 52 Thanks: 0  Re: should i apply the product rule or quotient rule?
yea.. you are right i just made the correction. That's one of dumbest mistake i have ever made 

Tags 
apply, product, quotient, rule 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Product rule into chain rule  unwisetome3  Calculus  4  October 19th, 2012 01:21 PM 
Quotient/Product rule to differentiate functions  jkh1919  Calculus  13  July 21st, 2012 04:18 AM 
Apply Simpson's rule: integration!  miner  Calculus  3  December 24th, 2011 09:17 PM 
Apply Simpson's 1/3 rule: why applicable  miner  Calculus  1  December 24th, 2011 08:25 PM 
how do yo solve this one using chain rule with quotient rule  Peter1107  Calculus  1  September 8th, 2011 10:25 AM 