Qualification > Math

C1 and C2 DOUBTS HERE!!!!!

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MasterMath:
@The Mysterious Dude .. you did a small mistake up there .. np = -30

so you'll get n= 10 as you said but p=-3

:)

I can help any1 if needed :)

Khey [Rainbow]:
this is not a ppq..this was given by my teacher
its alryt if u cant solve it

Ghost Of Highbury:

--- Quote from: A@di on May 04, 2010, 06:16:10 pm ---okay, i can help in a)i) part

for AB to be perpendicular to BC, the product of their gradients shud be -1

lets try, 'm' of AB = (9-3)/(5-1) = 6/4 = 3/2

           'm' of BC = (7-9)(8-5) = -2/3

3/2 * -2/3 = -1

hence proved.

a)ii) first find the co-ordinates of M i.e ((8+1)/2, (7+3)/2) = (4.5,5)

length of BM = = = = 4.03

length of CM= = =  = 4.03

b) Eqn of a circle = (x-h)^2 + (y-k)^2 = r^2
 
h,k = co-ordinates of the center of the circle, here of M

h = 4.5
k = 5
r = 4.03

(x-4.5)^2 + (y-5)^2 = 16.25

Hence proved
@Dude - SOrry i cudnt help much, i used my add. math knowledge to solve this for him. U have a lotta Qs to solve.. :)

--- End quote ---

@Khey, MasterMath - Did u check this answer? If any errors, plz tell me, i tried solving it.

Khey [Rainbow]:
yah its right!

Saladin:
Daym, forgot the minus sign.

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