Differentiation help...

Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.

Announcements Posted on
TSR launches Learn Together! - Our new subscription to help improve your learning 16-05-2013
IMPORTANT: You must wait until midnight (morning exams)/4.30AM (afternoon exams) to discuss Edexcel exams and until 1pm/6pm the following day for STEP and IB exams. Please read before posting, including for rules for practical and oral exams. 28-04-2013
Sign in to Reply
  1. Nkhan's Avatar
    • Adored and Respected Member
    • Location: Bristol
    • Posts: 435
    Differentiation help...
    Question-Differentiate this 5 / (3-2x)

    This is what I done:
    5/(3-2x) = (3-2x)^-5
    dy/dx= -5(3-2x)^-6 X dy/dx (3-2x)
    = -5 (3-2x)^-6 X -2
    =10(3-2x)^-6 ----> 10 / (3-2x)^6

    The answer in the book says: 10 / (3-2x)^2 ?? What have I done wrong?
  2. Mechie's Avatar
    • TSR Demigod
    • Posts: 6,526
    Re: Differentiation help...
    This is the second thread you've made about this exact same question. One is sufficient.
Sign in to Reply
Share this discussion:  
Article updates
Moderators

We have a brilliant team of more than 60 volunteers looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Reputation gems:
The Reputation gems seen here indicate how well reputed the user is, red gem indicate negative reputation and green indicates a good rep.
Post rating score:
These scores show if a post has been positively or negatively rated by our members.