Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    1
    ReputationRep:
    Hi all

    As per my screenshot, how do I differentiate from fx to fxx?

    Thanks in advance!

    Offline

    16
    ReputationRep:
    I cannot load the picture
    • TSR Support Team
    • Very Important Poster
    • Welcome Squad
    Offline

    20
    ReputationRep:
    TSR Support Team
    Very Important Poster
    Welcome Squad
    (Original post by Texcoco95)
    Hi all

    As per my screenshot, how do I differentiate from fx to fxx?

    [IMAGE]

    Thanks in advance!
    Looks like the quotient rule.
    Online

    22
    ReputationRep:
    (Original post by Texcoco95)
    Hi all

    As per my screenshot, how do I differentiate from fx to fxx?

    Thanks in advance!
    Use the quotient rule and keep in mind that \frac{\partial}{\partial x} \left(x^2 + y^2\right)^{3/2} = \frac{3}{2} \times 2x \times (x^2 + y^2)^{3/2 - 1}.
    Offline

    13
    ReputationRep:
    (Original post by Zacken)
    Use the quotient rule and keep in mind that \frac{\partial}{\partial x} \left(x^2 + y^2\right)^{3/2} = \frac{3}{2} \times 2x \times (x^2 + y^2)^{3/2}.
    how do u square a eqn like this

    -\sqrt{x}<1

    and how to diffrentiate f(3x) with respect to x ???
    Online

    22
    ReputationRep:
    (Original post by Duke Glacia)
    how do u square a eqn like this

    -\sqrt{x}<1

    and how to diffrentiate f(3x) with respect to x ???
    Is this related to the thread?

    The first bit isn't an equation...?

    \displaystyle \frac{\mathrm{d}}{\mathrm{d}x}f(  3x) = 3f'(3x).
    Offline

    9
    ReputationRep:
    (Original post by Zacken)
    Use the quotient rule and keep in mind that \frac{\partial}{\partial x} \left(x^2 + y^2\right)^{3/2} = \frac{3}{2} \times 2x \times (x^2 + y^2)^{3/2}.
    It should be \frac{\partial}{\partial x} \left(x^2 + y^2\right)^{3/2} = \frac{3}{2} \times 2x \times (x^2 + y^2)^{1/2}
    Online

    22
    ReputationRep:
    (Original post by poorform)
    It should be \frac{\partial}{\partial x} \left(x^2 + y^2\right)^{3/2} = \frac{3}{2} \times 2x \times (x^2 + y^2)^{1/2}
    Whoops! Meant to do 3/2 - 1. Thanks!
    Offline

    9
    ReputationRep:
    (Original post by Zacken)
    Whoops! Meant to do 3/2 - 1. Thanks!
    yeah I always copy over latex and forget to change little things haaaa. Just making it clear to the op who may not have spotted it
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?
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.