ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 unit (3 Viewers)

Examine · Sep 3, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Oh I see it now lol. Thanks Sy.

Aysce · Sep 3, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Examine said:
I have reached that form, though I don't understand how you reached a=1/4. (Seems like what I thought was how to do it was wrong )

Notice that the general form is: (x-h)^2 = 4a(y-k)

So "equating" the general form with the form above would give you 4a =1, therefore a=1/4.

Aysce · Sep 3, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Aww

Examine · Sep 3, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

(But srsly even if I don't get over 85 I'll buy you guys a subway cookie each whenever I see you)

Examine · Sep 3, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

The points P and Q on the curve x=2at, y=at^2 have parameters p and q respectively.

c)Show that PQ intersects the directrix at ([2a(pq-1)]/(p+q), -a)

If it's more convenient Exercise 9E 3C in Year 11 extension 1 maths Cambridge.

Sy123 · Sep 3, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

$P(2ap, ap^2) \ \ Q(2aq,aq^2) \\ m_{PQ}=\frac{ap^2-aq^2}{2ap-2aq} \\ m_{PQ}=\frac{p+q}{2} \\ \\ eqn_{PQ} \Rightarrow y-ap^2=\frac{p+q}{2}(x-2ap) \\ \\ y=\frac{1}{2}(p+q)x-apq \\ \\ $Intersects with directrix line:$ \ \ y=-a \\ \therefore $Intersection of directrix is$ \ \ y=-a \rightarrow -a=\frac{1}{2}(p+q)x-apq \\ \\ x=\frac{2apq-2a}{p+q}=\frac{2a(pq-1)}{p+q} \\ \\ \therefore $Intersection of PQ with directrix is$ (\frac{2a(pq-1)}{p+q}, -a)$

Examine · Sep 12, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Did the exam, though probably didn't make it.

But I'd like to thank all of you guys, you've definitely helped me with this exam.

iBibah · Sep 12, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Examine said:
Did the exam, though probably didn't make it.

But I'd like to thank all of you guys, you've definitely helped me with this exam.

Did you attempt every question at least?

deswa1 · Sep 12, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Examine said:
Did the exam, though probably didn't make it.

But I'd like to thank all of you guys, you've definitely helped me with this exam.

At least you gave it your best- hopefully you'll make it in. Good luck bro

Examine · Sep 12, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

iBibah said:
Did you attempt every question at least?

Ran out of time to attempt last 2 parts of the last question. (Once the teacher said 15 minutes left I basically freaked out and couldn't really do anything).

I think my mark is between 75%-85%

iBibah · Sep 12, 2012

Re: ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 un

Examine said:
Ran out of time to attempt last 2 parts of the last question. (Once the teacher said 15 minutes left I basically freaked out and couldn't really do anything).

I think my mark is between 75%-85%

That's OK, like deswa said, at least you gave it your all. What % needed to do 4 unit?

ITT we help examine to get 85 in his Maths extension 1 yearlies so he can do 4 unit (3 Viewers)

Examine

same

Aysce

Well-Known Member

Aysce

Well-Known Member

Examine

same

Examine

same

Sy123

This too shall pass

Examine

same

iBibah

Well-Known Member

deswa1

Well-Known Member

Examine

same

iBibah

Well-Known Member

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