C1 edexcel doubts!!!

[Amr Fouad]

oh yes!!!! so the ht.. will always be the one perpendicular to the base??

Of course!! Its a must!

[Amr Fouad]

here it is not mentioned tht P is perpendicular???

Yes..but u have to use logic and common sense...the base is on the y-axis..Therefore ANY point with its x-coordinate will be perpendicular to it!

[Igcseboy]

Yes..but u have to use logic and common sense...the base is on the y-axis..Therefore ANY point with its x-coordinate will be perpendicular to it!

oh ya Thanks

[Amr Fouad]

JAN 2009 8 b (ii) :

As i said before:

y-intersections-----> put x=0:

(1)^2 (2-0)= 2 --------> (0,2)

x-intersections-----> put y=0:

x=-1, 2 --------) (-1,0) (-1,0) (2,0)

Then draw a cubic graph...since coefficient of x^3 <0 (when u expand the function), it will take the negative parabola form..

THATS IT! lol

[Igcseboy]

JAN 2009 10 d
JAN 2006 9

[Amr Fouad]

Sorry..I'm out now..When I go home 

[Igcseboy]

ok..

Thanx Aloot