Results are out! Find what you need...fast. Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

Core Maths 3: Could someone point me in the right direction

Announcements Posted on
Will you get the grades you need for uni? Get prepared today and de-stress, sign up to email alerts for course places! 02-06-2015
Waiting on IB results? Our IB results hub explains everything you need to know 01-06-2015
  1. Offline

    ReputationRep:
    Hi there

    I have the following questions;



    I can see that these are to do with differentiation, but for (i) do I need to do anything to the formula given, or can I just plug t = 0 straight into this? So the answer for (i) is 0??

    And also could someone give me a little clue about working out the other questions as well

    Cheers
  2. Offline

    ReputationRep:
    i) when t = 0, V = 0. Just substitute the t = 0 in to the equation.

    ii) Then rate when volume is increasing means do differentiation. Differentiate the equation of V = root(2t + t^2) , After differentiation, substitute t = 1 into differentiated equation.

    iii) 10m^3 means volume, V is 10. So, just substitute V = 10 into V = root(2t + t^2) --> original equation. and you can fine the time, t. probably end up with a quadratic. And just take the suitable answer.
  3. Offline

    ReputationRep:
    (Original post by 3uNic3)
    i) when t = 0, V = 0. Just substitute the t = 0 in to the equation.

    ii) Then rate when volume is increasing means do differentiation. Differentiate the equation of V = root(2t + t^2) , After differentiation, substitute t = 1 into differentiated equation.

    iii) 10m^3 means volume, V is 10. So, just substitute V = 10 into V = root(2t + t^2) --> original equation. and you can fine the time, t. probably end up with a quadratic. And just take the suitable answer.

    aww thank you so much
  4. Offline

    ReputationRep:
    (Original post by jackie11)
    aww thank you so much
    no prob

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: April 17, 2012
TSR Support Team

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

New on TSR

It's IB results day tomorrow

Check out our IB results hub here & get prepared here

Study resources
x

Think you'll be in clearing or adjustment?

Hear direct from unis that want to talk to you

Get email alerts for university course places that match your subjects and grades. Just let us know what you're studying.

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