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    Does anyone have a list of all of the formulas that we need to know for these edexcel exams?
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    (Original post by sassysiren)
    Does anyone have a list of all of the formulas that we need to know for these edexcel exams?
    yes i do
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    (Original post by chats)
    yes i do
    would you be able to send them to me please?
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    (Original post by sassysiren)
    would you be able to send them to me please?
    lol how can i send them?
    i'll post them up here in a min
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    (Original post by chats)
    lol how can i send them?
    i'll post them up here in a min
    thats actually a good point thanks
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    P1 you need to know:

    quadratic formula:

    ax^2+bx+c=0 has roots -b+- rootb^2-4ac/2a

    arithmetic series

    Un=a+(n-1)d

    Sn=1/2n(a+l) or 1/2n(2a+(n-1)d)


    geometric series

    Un=ar^n-1

    Sn=a(i-r^n)/1-r


    sum to infinity a/1-r when r<1
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    s1 theres a load of formulas but most of them are in the formula booklet u get, i advise you get one before the exam and familiarise yourself with the formulaes or u wont no what ur doing.

    mean= Ex/n or Efx/Ef

    standard deviation is square root of variance

    interquartile range IQR = Q3-Q1

    P(A')=1-P(A)

    for independant events, P(B!A)=P(B)
    P(A!B)=P(A)
    P(AnB)=P(A)P(B)
    note ignore the exclamation mark its just a straight line

    E(aX+b)=aE(X)+b
    Var (aX+b)=a^2Var(X)

    standerdised normal random variable Z=X-mean/variance


    i think that all of them
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    Im resitting P1 and S1 too next week.

    For P1
    you need to know the following:

    quadratic formula
    discriminant b^2 - 4ac
    AP nth = a + (n - 1)d
    Sn = n/2 (2a + (n - 1)d)

    GP nth = ar^ n-1
    Sn = n(1 - r)/ 1 - r
    Infinity one

    Sine rule
    Cosine rule
    tanx = sinx / cosx
    sin^2 + cos^2 = 1
    Cotx, Cosecx, Secx

    y = mx + c
    gradient = y2 - y1 / x2 - x1
    length of straight line = square root of (x2 - x1)^2 + (y2 - y1)^2
    Midpoint of straight line = (0.5(x1 + x2), 0.5(y1 + y2))





    s1

    P(AuB) = P(A) + P(B) - P(AnB)
    Conditional
    Indepenedent
    Mutually exclusive events

    Sxx, Sxy, Syy, regression line etc... (but they will be in the formula booklet)

    Frequency density = frequency / class width (for histograms)

    Um I will let you know if theres anymore, Im doing this from memory, so I think there is more.
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    (Original post by BlueAngel)
    Im resitting P1 and S1 too next week.

    For P1
    you need to know the following:

    quadratic formula
    discriminant b^2 - 4ac
    AP nth = a + (n - 1)d
    Sn = n/2 (2a + (n - 1)d)

    GP nth = ar^ n-1
    Sn = n(1 - r)/ 1 - r
    Infinity one

    Sine rule
    Cosine rule
    tanx = sinx / cosx
    sin^2 + cos^2 = 1
    Cotx, Cosecx, Secx

    y = mx + c
    gradient = y2 - y1 / x2 - x1
    length of straight line = square root of (x2 - x1)^2 + (y2 - y1)^2
    Midpoint of straight line = (0.5(x1 + x2), 0.5(y1 + y2))





    s1

    P(AuB) = P(A) + P(B) - P(AnB)
    Conditional
    Indepenedent
    Mutually exclusive events

    Sxx, Sxy, Syy, regression line etc... (but they will be in the formula booklet)

    Frequency density = frequency / class width (for histograms)

    Um I will let you know if theres anymore, Im doing this from memory, so I think there is more.
    thanks
 
 
 
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