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

    7
    ReputationRep:
    Just a question, are you allowed to write vectors in Column notation in M1?

    I prefer using it over, simple i and j algebraic notation.

    Haven't reviewed mark schemes / past papers yet so just asking.
    • Thread Starter
    Offline

    21
    ReputationRep:
    (Original post by SaadKaleem)
    Just a question, are you allowed to write vectors in Column notation in M1?

    I prefer using it over, simple i and j algebraic notation.

    Haven't reviewed mark schemes / past papers yet so just asking.
    I think you are for your working out, but a lot of questions ask for i and j notation so it's best to ensure your answers are always in i and j.
    Offline

    14
    ReputationRep:
    (Original post by SaadKaleem)
    Just a question, are you allowed to write vectors in Column notation in M1?

    I prefer using it over, simple i and j algebraic notation.

    Haven't reviewed mark schemes / past papers yet so just asking.
    (Original post by jamestg)
    I think you are for your working out, but a lot of questions ask for i and j notation so it's best to ensure your answers are always in i and j.
    Column vectors are fine, including for answers. The general instructions at the beginning of the mark schemes say
    "Accept column vectors in all cases."
    Offline

    7
    ReputationRep:
    (Original post by jamestg)
    I think you are for your working out, but a lot of questions ask for i and j notation so it's best to ensure your answers are always in i and j.
    (Original post by tiny hobbit)
    Column vectors are fine, including for answers. The general instructions at the beginning of the mark schemes say
    "Accept column vectors in all cases."
    Sounds good, thank you.
    Offline

    21
    ReputationRep:
    tips on m1 vectors?

    i can score 60-65% of the marks on m1 vectors generally
    but i score 85-100% on c4 vectors.
    Offline

    7
    ReputationRep:
    (Original post by XxKingSniprxX)
    tips on m1 vectors?

    i can score 60-65% of the marks on m1 vectors generally
    but i score 85-100% on c4 vectors.
    I've responded
    Offline

    2
    ReputationRep:
    can someone help me in this trapezium question, i need help finding the height the formula is
    H=b-a/n
    but when i used this formula i am unable to find the answer, the answer is supposed to be H=3
    Attached Images
     
    Offline

    22
    ReputationRep:
    (Original post by djmans)
    can someone help me in this trapezium question, i need help finding the height the formula is
    H=b-a/n
    but when i used this formula i am unable to find the answer, the answer is supposed to be H=3
    Look at the diagram, count the intervals using your fingers. There are 1, 2, 3 intervals. Hence, h = \frac{11-2}{3} = \frac{9}{3} = 3
    Offline

    3
    ReputationRep:
    (Original post by djmans)
    can someone help me in this trapezium question, i need help finding the height the formula is
    H=b-a/n
    but when i used this formula i am unable to find the answer, the answer is supposed to be H=3
    this isnt m1, this is c4.
    nevertheless, i hope your doubt is cleared
    Offline

    2
    ReputationRep:
    (Original post by Zacken)
    Look at the diagram, count the intervals using your fingers. There are 1, 2, 3 intervals. Hence, h = \frac{11-2}{3} = \frac{9}{3} = 3
    how is it 3, on the graph it shows 4 lines and on the table.
    Offline

    2
    ReputationRep:
    (Original post by therecovery)
    this isnt m1, this is c4.
    nevertheless, i hope your doubt is cleared
    lol my bad i clicked on the wrong thread
    Offline

    22
    ReputationRep:
    (Original post by djmans)
    how is it 3, on the graph it shows 4 lines and on the table.
    n is the number of rectangles. 4 lines make 3 rectangles.
    Offline

    2
    ReputationRep:
    (Original post by Zacken)
    n is the number of rectangles. 4 lines make 3 rectangles.
    thank you so much for the help
    Offline

    22
    ReputationRep:
    (Original post by djmans)
    thank you so much for the help
    No worries.
    Offline

    2
    ReputationRep:
    (Original post by Zacken)
    No worries.
    if you dont mind could you help me with this too
    Attached Images
     
    Offline

    22
    ReputationRep:
    (Original post by djmans)
    if you dont mind could you help me with this too
    (i) is just an application of (ab)^{n} = a^n b^n, so:

    \displaystyle 

\begin{equation*}y^{1/3} = \left(\frac{1}{27}x^3\right)^{1/3} = \left(\frac{1}{27}\right)^{1/3} \times (x^3)^{1/3} = \frac{1}{\sqrt[3]{27}} \times x = \cdots\end{equation*}

    Where we used the fact that \left(\frac{a}{b}\right)^n= \frac{a^n}{b^n} and 1^n = 1.

    (ii) is just an application of the fact that y^{-1} = \frac{1}{y} and \frac{1}{\frac{a}{b}} = \frac{b}{a}.

    So \displaystyle y = \frac{x^3}{27} \Rightarrow y^{-1} = \frac{1}{y} = \frac{27}{x^3}. Then 3y^{-1} = \cdots?

    (iii) is just 27y = 27 \times \frac{x^3}{27} = x^3 so \sqrt{27y} = \sqrt{x^3} = (x^3)^{1/2} = \cdots

    Remember that (a^n)^m = a^{nm}
    Offline

    2
    ReputationRep:
    When finding out what the frictional force is I see the b1 marks for F=Mu(R) does your notation matter would I still get the B1 mark for Fr=Mu(N).
    Offline

    3
    ReputationRep:
    (Original post by Middriver)
    When finding out what the frictional force is I see the b1 marks for F=Mu(R) does your notation matter would I still get the B1 mark for Fr=Mu(N).
    I would say it's best to avoid using N as that's an SI unit
    Offline

    22
    ReputationRep:
    (Original post by Middriver)
    When finding out what the frictional force is I see the b1 marks for F=Mu(R) does your notation matter would I still get the B1 mark for Fr=Mu(N).
    'course you would get the mark. You can use whatever notation you want as long as it's clear what you're doing.
    Offline

    2
    ReputationRep:
    (Original post by Zacken)
    'course you would get the mark. You can use whatever notation you want as long as it's clear what you're doing.
    Thanks! guess I'm just stressing.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: October 25, 2016
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.