Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta

I can't stop forgetting "+C" (integration) watch

    • Thread Starter
    Offline

    0
    ReputationRep:
    Any help? I'm doin c4 atm and its always been an issue


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    Haha, I have been having the same issue with this in C1... :L
    • Thread Starter
    Offline

    0
    ReputationRep:
    It's very frustrating I tell, walking out of exams and then some1 asks did u guys remember +c and I'm like **** lol


    Posted from TSR Mobile
    Offline

    0
    ReputationRep:
    (Original post by krazie.x)
    It's very frustrating I tell, walking out of exams and then some1 asks did u guys remember +c and I'm like **** lol


    Posted from TSR Mobile
    There's no way you can find an alternate method to learn it, you just gotta remember its the constant of integration, so when limits aren't defined add it just for those marks
    Offline

    14
    ReputationRep:
    For exams, what I would do for stuff I could never remember is that I'd read through it immediately before I went into the exam, then straight away (once the exam starts) I'd write out the stuff that I'd struggle to remember later on the back of the exam paper or whatever while it was still fresh in my mind. That way I could refer to it later when I was deep into the exam.
    Offline

    12
    ReputationRep:
    Whenever you caome across a question that might/will lead to integration write in big capitals "dont forget +c!!!!". That way when you check over your answers at the end you'll see the note and think oh yeah.

    Samething with radians, see a pi sign and trig? Write at start "RADIANS!!!". You'll never have a problem now.
    Offline

    14
    ReputationRep:
    Just remind yourself after the hours and hours you have put in to learn all the methords of integration, writing a "+C" is the easiest mark you will get in the whole exam.
    Offline

    2
    ReputationRep:
    well...you know you always forget it, therefore its going to be the first thing you think about when these questions come up.
    thats how i remembered a tonne of stuff...because i always forgot it lol
    Offline

    11
    ReputationRep:
    (Original post by krazie.x)
    Any help? I'm doin c4 atm and its always been an issue


    Posted from TSR Mobile
    You could when doing an integration question first wite down +C next to the question,or even next to the next question. Then just do the integration process. After this just look back and you'll remember that you have to do the +C part.

    Also when you finish the question, ask yourself if you have one everything. That way you'll remember about the +C part.
    Offline

    0
    ReputationRep:
    Write '+C' on the inside of your eyelids.
    Offline

    8
    ReputationRep:
    I have a post-it note on my bedroom wall above my desk that just reads "+C" in big block letters.

    I always remember +C now, so I guess it worked
    Offline

    0
    ReputationRep:
    When you go into your exam write it on the first page of your paper, or on the last page so you see it at the end and remember to check. The more you practice the questions, you'll just remember to do it
    Offline

    20
    I've been doing that on C4 too It's so annoying, I've never had a problem remembering it before
    Offline

    2
    ReputationRep:
    Just remember that an antiderivative of a function is another function whose derivative is the function you started with. Then, try to picture a graph of a simple function so you can picture its derivative by thinking of tangents to the curve and then picture shifting it up and down the y-axis and noting that the tangents are parallel.

    I like to think of maths in programming terms in the sense that I always concentrate on the data type of any object I am dealing with. In this sense, when I think of 'indefinite integral' I think:

    input - a function
    output - a parameterised family of functions.
    • Thread Starter
    Offline

    0
    ReputationRep:
    Thanks guys, some really helpful ideas, will try them


    Posted from TSR Mobile
    Offline

    1
    ReputationRep:
    I'm not sure if this will help you remember, but I think it's a useful concept.

    Instead of:

     \int x^2 dx = \frac{x^3}{3} + C

    Write the integral as:

     \int_{x_0}^{x} x'^2 dx' = \left[ \frac{x'^3}{3} \right]_{x_0}^{x} =  \frac{x^3}{3} -\frac{x_0^3}{3} =  \frac{x^3}{3} + \mathrm{Const.}

    x' is a 'dummy' variable of integration which doesn't appear in the final expression. You integrate from a constant lower limit to your desired variable as the upper limit, x.

    These kind of integrals are often seen in practice, where the lower limit could be something like a reference state (if your variable were some thermodynamic quantity).
    Offline

    3
    ReputationRep:
    (Original post by krazie.x)
    Any help? I'm doin c4 atm and its always been an issue


    Posted from TSR Mobile
    For the C4 exam you normally have to integrate between bounds so the +c bit isn't important (and by usually I mean 90% of the time, unless it is a part a question)
    Offline

    9
    ReputationRep:
    (Original post by krazie.x)
    Any help? I'm doin c4 atm and its always been an issue


    Posted from TSR Mobile
    I always have the same issue!
    • Very Important Poster
    Offline

    19
    ReputationRep:
    Very Important Poster
    My classmate once told me "Don't forget the cheeseburger!"

    I didn't forget to write +c since
    Offline

    0
    ReputationRep:
    Make a point to go through the paper when you have finished and check that you've not missed out the +C's.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: April 12, 2013
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?

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.