Qualification > Math

C1 edexcel doubts!!!

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Amr Fouad:

--- Quote from: Igcseboy on April 22, 2010, 12:53:29 pm ---
oh yes!!!! so the ht.. will always be the one perpendicular to the base?????

--- End quote ---

Of course!! Its a must!

Amr Fouad:

--- Quote from: Igcseboy on April 22, 2010, 12:56:15 pm ---
here it is not mentioned tht P is perpendicular???

--- End quote ---

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:

--- Quote from: ~ A.F ~ on April 22, 2010, 12:58:02 pm ---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!

--- End quote ---

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 :P

Igcseboy:
JAN 2009 10 d
JAN 2006 9

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