HL Maths formulas

nommm

Anyone know a website where I can find a list of the formulas that we need to know that aren't in the log tables?

Patriciamc93

Nope but off the top of my head:
The alpha beta formulas.
Forming a quadratic given two roots formula.
Nature of the roots.
The fact that the Sn formula changes for a geometric sequence if r is greater than 1 or less than -1.
Natural number series n and n squared.
Diagonal matrices.
Induction methods.
How to get assuymtotes
Speed and acceleration.
Area between curve and axis in integration.
Volume around the y-axis

Touching circles formulas
Dividing a line in a given ratio.
perpendicular vectors
That (ai+bj).(ci+dj)=ac+bd
Concurrent lines
External division of a line (internal given)
No transformation formulas if there are any
The difference equation thing in probability

Sorry if I missed any and hope it helps.

nommm

Ye it does. I'm just trying to make sure I have them all learnt. I don't want to realise that I forgot one in the exam next Friday.

partyatmygaff

Patriciamc93 wrote: »

The fact that the Sn formula changes for a geometric sequence if r is greater than 1 or less than -1.

Are you sure about that? It says nothing in the log tables about the Sn formula for a geometric series having a range.

Patriciamc93

partyatmygaff wrote: »

Are you sure about that? It says nothing in the log tables about the Sn formula for a geometric series having a range.

Ya the one in the tables is only for |r|<1
you must change it to Sn= a(r^n-1)/r-1 for |r|>1

conormccarthy92

sorry if its slightly off topic but i was just wondering what theorems you need for the paper 1 , dont wanna be caught out on the day . i have learnt these already :

factor theorem
de moivres theorem
differential rule
product rule
chain rule
quotient rule
volumes of a cone/sphere (integration)

am i missing any ??

Patriciamc93

Nope .... Part from the first principles ones.... But I kinda just do them as questions anyway.

Gumbi

conormccarthy92 wrote: »

sorry if its slightly off topic but i was just wondering what theorems you need for the paper 1 , dont wanna be caught out on the day . i have learnt these already :

factor theorem
de moivres theorem
differential rule
product rule
chain rule
quotient rule
volumes of a cone/sphere (integration)

am i missing any ??

If I'm not doing q3, does that mean I can completely avoid DeMoivre's Theorem and complex numbers?

Patriciamc93

Gumbi wrote: »

If I'm not doing q3, does that mean I can completely avoid DeMoivre's Theorem and complex numbers?

Ya .... As far as I know. But the proof may be asked in q5

Gumbi

Patriciamc93 wrote: »

Ya .... As far as I know. But the proof may be asked in q5

Thanks. I suppose I'll have to study it. Will the proofs total about 50 out of the 600 marks?

Patriciamc93

No I think there was only one on the paper last year. Paper 2 I think!

But this year we could either get none or get a good few!

Gumbi

Thanks.

MathsManiac

Patriciamc93 wrote: »

Ya the one in the tables is only for |r|<1
you must change it to Sn= a(r^n-1)/r-1 for |r|>1

You don't have to change it. The one in the tables works for any value of r other than 1, as does your version. The only difference between them is that the sign is opposite, both above and below the line, so the expressions are identical.