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Edexcel FP2 Official 2016 Exam Thread - 8th June 2016

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Are you allowed to do multiple attempts at a question and if one of them is correct get full marks? Of course only if the number of possible answers is infinite.

Reply 781

A Slice of Pi

Original post by TheFarmerLad

Hate proof by induction :biggrin:

It's funny because a lot of people say that but if you're doing STEP then it's one of the most valuable tools for proof. I guess it's just getting used to how the exam board want it set out.

Reply 782

edothero

Original post by Nikhilm

You can't do that for a dy/dx expansion though right?

Why not?

Spoiler

Reply 783

justalawyer1998

Original post by edothero

Why not?

Spoiler

No, i mean when the question is given in as a differential equation, not in terms of y and x but with dy/dx. There's no way of checking this without actually have to convert it back to y?

Reply 784

edothero

Original post by Nikhilm

No, i mean when the question is given in as a differential equation, not in terms of y and x but with dy/dx. There's no way of checking this without actually have to convert it back to y?

I don't understand, happen to have an actual question like this?

Reply 785

Rkai01

Attachment not found

For 11b how is it done? I could see a pattern but then I could only see of making x=0 not 2 and then wasn't sure what to do with the r

image.jpg507.2KB

Reply 786

kkboyk

When doing the inequality questions how do you know whether a particular algebraic fraction is negative? Its confusing me.

Reply 787

Maetras

Original post by Rkai01

Attachment not found

For 11b how is it done? I could see a pattern but then I could only see of making x=0 not 2 and then wasn't sure what to do with the r

ln2?

Reply 788

Maetras

Original post by Rkai01

Attachment not found

For 11b how is it done? I could see a pattern but then I could only see of making x=0 not 2 and then wasn't sure what to do with the r

Here's how I did it

(edited 7 years ago)

Reply 789

justalawyer1998

Original post by edothero

I don't understand, happen to have an actual question like this?

I mean for when its solving a taylor differential equation

Reply 790

Rkai01

Original post by A Slice of Pi

Yes

What final 2 terms did you end up with for the method of differences?

Reply 791

Rkai01

Original post by target21859

Here's how I did it

Ah yeaa I was getting there but that is correct ln2 thanks a lot.

Reply 792

A Slice of Pi

Original post by Rkai01

What final 2 terms did you end up with for the method of differences?

Is this for the question I made or the one Zacken made? One of them is in the solution I gave in a spoiler earlier. They should all vanish apart from the first and last if I remember rightly...

Reply 793

Rkai01

Original post by target21859

Here's how I did it

Would you happen to know how to go about 11b. I feel dumb because it's a hence question but I can't integrate with the sqrt and by substitution becomes awkward.

Reply 794

Rkai01

Original post by A Slice of Pi

Is this for the question I made or the one Zacken made? One of them is in the solution I gave in a spoiler earlier. They should all vanish apart from the first and last if I remember rightly...

No yours was fine it was zackens

Reply 795

Zacken

Original post by edothero

I don't understand, happen to have an actual question like this?

Something like

y'' + y' + y = ax + b

, now give a series solution of

y

up to the term in

x^3

Reply 796

fpmaniac

Someone please explain to me how to work with polar equatiions and finding the perpedicular/parallel line when you have r squared.

Reply 797

Rkai01

Original post by A Slice of Pi

Is this for the question I made or the one Zacken made? One of them is in the solution I gave in a spoiler earlier. They should all vanish apart from the first and last if I remember rightly...