The Edexcel C1 (16/05/12 - AM) Revision Thread

:s no one taking it?

I'm resitting it too (:

How are the past papers/ revision going?

How do you plot the curve by completing square? :/
I always make a mistake in this.

I'm resitting it too! and i'm pretty sure i've covered every past paper possible but still getting stuff wrong thanks to silly mistakes -.-

I've done all the past papers but I can't get 100 because of silly mistakes

I'm actually planning on starting some soloman papers after I finish the questions in my book, so that's a thought. I've left the example paper one and Jan 12 to do for tomorrow so I know exactly what I get.

I personally don't like doing solomon papers because if I do them, i might overcomplicate everything when it comes to the exam

Yh but it does help with the questions towards the end, that way you can't get thrown off.

I've done all the past papers. The highest I got was 70 and the lowest was 64. The questions I get wrong are actually not the hard ones. I make silly mistakes

thats very true, might try a couple of the qus since i've done every paper possible..

Just tried one of the soloman papers they're aren't actually that hard. Did Paper A and got 68/75, lost marks on not being able to count >.<

How do you plot the curve by completing square? :/
I always make a mistake in this.

Oh no! For me, even if i check it a million times, I will skim over a mistake (as lame as it is )

If you get something like

y = (x + 3)^2 - 5
then
the minumum value for y is when (x + 3) = 0
hence y = -5 when x = -3
(-3,-5) is the minimum

if (x + 3)^2 - 5 = 0
(x + 3)^2 = 5
x+3 = + or - root(5)
and then
x = -3 + or - root(5)
are the solutions where it crosses the x-axis (it's OK to mark these as surd solutions on the axes of your sketch).

if it's
y = (x + 3)^2 + 8
then you can still find the minimum point (-3,8)
but (x + 3)^2 = -8 and you can't square root a negative there are no real solutions.