Current Year 12 Thread Mark I (2013-2014)

Yup... well I did Admaths so I pretty much did C1 + C2. I haven't done calculus in my course atm so I'll need to revise that. Differentiating with negative power I didn't know before but shouldn't take long to learn...

I'll have to learn M1 for summer though, not sure how long that'll take...

Also, you might find this interesting.

3=0, and I can show you the proof.

Want to see it?

Also, you might find this interesting.

3=0, and I can show you the proof.

Want to see it?

Differentiation with a negative power is the same. Just multiply by co efficient and subtract one from power.

M1 shouldn't take too long!



Go on

I do, but does it involve any one of these?

I have lots of other work I'd like to keep on top of though, doing extra reading for chemistry

so:

$x^2+x+1=0$
$x+1+\frac{1}{x}=0$
$x=-1-\frac{1}{x}$
$x^2-1-\frac{1}{x}+1=0$
$x^3-1=0$
$x^3=1$
$x=1$
Sub into first line
$1+1+1=0$
$3=0$

Can you figure out what's going on? :P

how'd you get from:

x = -1 - (1/x)

To

x^2 - 1 - (1/x) + 1 = 0

?

Sub it back in, I'll edit the post to make it clearer

So why do these things make 'sense'? When they're not?

Because you can't re arrange an equation and resub in?

that's what I thought when I was shown this

Hint: How many solutions does a linear equation have?
A quadratic?
A cubic?

1, 2, 3

So when we turned the quadratic into a cubic, we gave it another root.
This is known as a 'spurious' root.

spurious
ˈspjʊərɪəs/
adjective

•

1.
not being what it purports to be; false or fake.

If you do maths at uni I think you'll learn about them

Is anyone here doing the Chemistry Olympiad?

So when we turned the quadratic into a cubic, we gave it another root.
This is known as a 'spurious' root.

spurious
ˈspjʊərɪəs/
adjective

•

1.
not being what it purports to be; false or fake.

If you do maths at uni I think you'll learn about them

Is anyone here doing the Chemistry Olympiad?

Anyone doing OCR B Advancing Physics?

About the UK sutton trust summer camp this year, I'm not sure what they mean by transport is payed for to and from the summer school i.e the Universities. Is that actually from my country Wales to England/Scotland as that seems a little unlikely/hard to organise if for example there were two of us going to one of the Unis from one college... Anyone know anything?


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Is anyone here doing the Chemistry Olympiad?