Turn on thread page Beta
    • Thread Starter
    Offline

    16
    ReputationRep:
    Can someone help me differentiate 3xe^{3x}-e^{3x}? I get 9xe^{3x}-3e^{3x} but apparently the answer is 9xe^{3x}+3e^{3x}-3e^{3x}.
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    Community Assistant
    Study Helper
    You should be using the product rule on the first term since it's a product of 3x and e^{3x}.
    Offline

    0
    ReputationRep:
    If y = e^ax

    Then dy/dx = ae^ax

    For individual functions.

    For y=f(x)g(x), you should use the product rule - dy/dx = f'xg(x) + g'xf(x)

    Offline

    0
    ReputationRep:
    hey everyone how would i differentiate 1over ln 1/2x ? i now that you have to do 1over 1/2 x but then what?
    Thanks
    Offline

    2
    ReputationRep:
    (Original post by Stach462)
    hey everyone how would i differentiate 1over ln 1/2x ? i now that you have to do 1over 1/2 x but then what?
    Thanks
    You should probably make a new thread for a different question.
    In any case, stick brackets in your question or I can't tell what it is you want to differentiate! :p:
    Offline

    0
    ReputationRep:
    (Original post by ViralRiver)
    Can someone help me differentiate ? I get but apparently the answer is .
    let u = 3x-1
    chain rule.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: September 25, 2010

University open days

  1. University of Bradford
    University-wide Postgraduate
    Wed, 25 Jul '18
  2. University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Wed, 25 Jul '18
  3. Bournemouth University
    Clearing Campus Visit Undergraduate
    Wed, 1 Aug '18
Poll
How are you feeling in the run-up to Results Day 2018?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.