Current Year 12 Thread Mark I (2012-2013)

Original post by justinawe

Surely 15 GCSEs >
9 IGCSEs in terms of workload, though?

IGCSEs are harder in a way but they don't have coursework.

Reply 7501

Original post by L'Evil Fish

Maybe... 15 GCSEs + Welsh Baccalaureate (worth 3/4 GCSEs) probably is :tongue:

But I have some useless GCSEs:
Art
Photography
Media
Business
Welsh

My Username is really Poisson Distribution :mmm:

How good is your Welsh? :redface:

Reply 7502

Original post by justinawe

How good is your Welsh?

my French is much better... :yy:

Welsh is terrible... :colonhash:

probably get an A/B... If I'm lucky!

My Username is really Poisson Distribution :mmm:

Reply 7503

Original post by Abject Testament

IGCSEs are harder in a way but they don't have coursework.

Yes, that's the good part. For me, anyway.

Reply 7504

Original post by justinawe

Yes, that's the good part. For me, anyway.

I love coursework though :tongue:

for science anyway :biggrin:

My Username is really Poisson Distribution :mmm:

Reply 7505

cheetahs56

Original post by L'Evil Fish

Does that say kx^2 if so:

f'(x) is: 2kx

My Username is really Poisson Distribution :mmm:

Yeah it did lol. Is there a generic way of finding the answer?

My Username is really Poisson Distribution :mmm:

Reply 7506

Original post by cheetahs56

Yeah it did lol. Is there a generic way of finding the answer?

My Username is really Poisson Distribution :mmm:

Yes

y = ax^n
dy/dx = (n)ax^(n-1)

Eg y = 5x^3
dy/dx = (3)5x^(3-1) = 15x^2

y = ax
dy/dx = a

Eg y = 6x
dy/dx = 6

y = a
dy/dx = 0

My Username is really Poisson Distribution :mmm:

Reply 7507

Original post by justinawe

Yes, that's the
good part. For me, anyway.

Same

Reply 7508

This Honest

Original post by L'Evil Fish

Yes

y = ax^n
dy/dx = (n)ax^(n-1)

Eg y = 5x^3
dy/dx = (3)5x^(3-1) = 15x^2

y = ax
dy/dx = a

Eg y = 6x
dy/dx = 6

y = a
dy/dx = 0

My Username is really Poisson Distribution :mmm:

C1?

This was posted from The Student Room's iPhone/iPad App

Reply 7509

Original post by cheetahs56

Yeah it did lol. Is there a generic way of finding the answer?

My Username is really Poisson Distribution :mmm:

The normal way?

\frac{d(kx^2)}{dx}

= 2(kx^{2-1})

= 2kx

If the constant is multiplied with a variable (i.e. x), you just leave it there when differentiating.

Reply 7510

Original post by This Honest

C1?

This was posted from The Student Room's iPhone/iPad App

Yeah, cheetah wanted the generic way :tongue:

so I gave it :yep:

My Username is really Poisson Distribution :mmm:

Reply 7511

cheetahs56

Original post by L'Evil Fish

Yes

y = ax^n
dy/dx = (n)ax^(n-1)

Eg y = 5x^3
dy/dx = (3)5x^(3-1) = 15x^2

y = ax
dy/dx = a

Eg y = 6x
dy/dx = 6

y = a
dy/dx = 0

My Username is really Poisson Distribution :mmm:

Lol, is that all it was? I knew the dy/dx rule already :tongue:

*sigh*, the humiliation when a year 11 is helping you with your Maths work. :colondollar:

And yep, C1 :biggrin:

My Username is really Poisson Distribution :mmm:

Reply 7512

Original post by cheetahs56

Lol, is that all it was? I knew the dy/dx rule already :tongue:

*sigh*, the humiliation when a year 11 is helping you with your Maths work. :colondollar:

And yep, C1 :biggrin:

My Username is really Poisson Distribution :mmm:

don't worry, he's one of a kind :wink:

Reply 7513

Really? Humiliation? That's a bit strongly worded.

Reply 7514

Original post by cheetahs56

Lol, is that all it was? I knew the dy/dx rule already :tongue:

*sigh*, the humiliation when a year 11 is helping you with your Maths work. :colondollar:

And yep, C1 :biggrin:

My Username is really Poisson Distribution :mmm:

that's all it is :tongue:

It's not humiliating :sigh:

My Username is really Poisson Distribution :mmm:

Reply 7515

Original post by Abject Testament

Same

Did you do IGCSEs as well?

Reply 7516

Mixture of IGCSEs and normal gcses

Reply 7517

Just in awe, can you check this, volume of revolution, of y = x + 3/Rootx between 1 and 4.

Spoiler

Is that right so far?

My Username is really Poisson Distribution :mmm:

(edited 11 years ago)

Reply 7518