**kingaaran**)

They're written by the same people, so, apart from the bits of roots, everything else has the potentiality to make an appearance in a standard FP1 Paper

Can you help with the induction for Jan 2016 IAL Quesiton 9?

Thanks much apreciated!

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#961

(Original post by **kingaaran**)

They're written by the same people, so, apart from the bits of roots, everything else has the potentiality to make an appearance in a standard FP1 Paper

They're written by the same people, so, apart from the bits of roots, everything else has the potentiality to make an appearance in a standard FP1 Paper

Can you help with the induction for Jan 2016 IAL Quesiton 9?

Thanks much apreciated!

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#963

(Original post by **economicss**)

Not very far at all, only got the equation! Please could you post your working for it have you done part b? Thanks

Not very far at all, only got the equation! Please could you post your working for it have you done part b? Thanks

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#964

(Original post by **fpmaniac**)

Can you properly explain to me how to do sigma r=0 to r=n with some examples. I still dont get it....

Can you properly explain to me how to do sigma r=0 to r=n with some examples. I still dont get it....

That's all you need to know. You want to just get a 1 at the bottom, so that you can then use your standard formulae

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#965

(Original post by **Hot&SpicyChicken**)

Well im going to die!

Can you help with the induction for Jan 2016 IAL Quesiton 9?

Thanks much apreciated!

Well im going to die!

Can you help with the induction for Jan 2016 IAL Quesiton 9?

Thanks much apreciated!

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#966

question: for the argument of z

i know you do tan^-1 (b/a) of a + bi

but do you keep a and b exactly how they are, or are they the mod of a and b?

example:

z = 1 - i

would it be tan-1(-1/1) or simply tan-1(1/1)... and why?

i know you do tan^-1 (b/a) of a + bi

but do you keep a and b exactly how they are, or are they the mod of a and b?

example:

z = 1 - i

would it be tan-1(-1/1) or simply tan-1(1/1)... and why?

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#967

(Original post by **TomWeller**)

question: for the argument of z

i know you do tan^-1 (b/a) of a + bi

but do you keep a and b exactly how they are, or are they the mod of a and b?

example:

z = 1 - i

would it be tan-1(-1/1) or simply tan-1(1/1)... and why?

question: for the argument of z

i know you do tan^-1 (b/a) of a + bi

but do you keep a and b exactly how they are, or are they the mod of a and b?

example:

z = 1 - i

would it be tan-1(-1/1) or simply tan-1(1/1)... and why?

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#968

question: for the argument of z

i know you do tan^-1 (b/a) of a + bi

but do you keep a and b exactly how they are, or are they the mod of a and b?

example:

z = 1 - i

would it be tan-1(-1/1) or simply tan-1(1/1)... and why?

For example, -2-3i, will be worked out -pi + arctan(3/2), and 2+3i, just arctan(3/2).

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#969

I dont understand what to use when doing proof for divisibility.

Do you prove for f(k+1) then prove thats divisible by x

or do you prove f(k+1)-f(k) is divisible by x

or do you prove f(k+1) -nf(k) is divisible by x?

How do I know which to do?

Do you prove for f(k+1) then prove thats divisible by x

or do you prove f(k+1)-f(k) is divisible by x

or do you prove f(k+1) -nf(k) is divisible by x?

How do I know which to do?

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#970

(Original post by **kingaaran**)

You should compute a and b without their signs and then use the signs (and an Argand diagram, I hope) to determine what the argument will be.

For example, -2-3i, will be worked out -pi + arctan(3/2), and 2+3i, just arctan(3/2).

You should compute a and b without their signs and then use the signs (and an Argand diagram, I hope) to determine what the argument will be.

For example, -2-3i, will be worked out -pi + arctan(3/2), and 2+3i, just arctan(3/2).

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#971

(Original post by **fpmaniac**)

So what would it be for sigma r=0 r=n for r and sigma r=0 and r=n for rsquared

So what would it be for sigma r=0 r=n for r and sigma r=0 and r=n for rsquared

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#973

(Original post by **AlfieClements**)

I dont understand what to use when doing proof for divisibility.

Do you prove for f(k+1) then prove thats divisible by x

or do you prove f(k+1)-f(k) is divisible by x

or do you prove f(k+1) -nf(k) is divisible by x?

How do I know which to do?

I dont understand what to use when doing proof for divisibility.

Do you prove for f(k+1) then prove thats divisible by x

or do you prove f(k+1)-f(k) is divisible by x

or do you prove f(k+1) -nf(k) is divisible by x?

How do I know which to do?

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#974

Can someone post a couple of tricky FP1 questions? The past papers are very repetitive.

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#975

(Original post by **hogree**)

Question.

When you differentiate a parabola (so something with the equation y^{2} = 4ax) would you always make the differential a +/- or would you put it as simply a +? Because if leaving it just as a +, it gives you just one equation when you plug in, because obviously there is just one gradient.. But a +/- makes more sense.

Anyone mind clearing this up?

Question.

When you differentiate a parabola (so something with the equation y

Anyone mind clearing this up?

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#976

(Original post by **techfan42**)

Always write f(k+1) and then aim to find f(k) within the equation

Always write f(k+1) and then aim to find f(k) within the equation

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#977

Well im going to die!

Can you help with the induction for Jan 2016 IAL Quesiton 9?

Thanks much apreciated!

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#979

(Original post by **AlfieClements**)

Okay, then if it doesn't work should I do f(k+1) - f(k)?

Okay, then if it doesn't work should I do f(k+1) - f(k)?

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#980

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