Qualification > Math

C1 and C2 DOUBTS HERE!!!!!

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Saladin:

--- Quote from: Khey on May 04, 2010, 06:44:49 pm ---yah its right!

--- End quote ---

can u chek if mine is rite???

MasterMath:
And for part b for the bank question the formula is

The G.P Sqnce is : P + P(1+r%) + P(1+r%)^2 ...P(1+r%)^n-1
Thats the sqnce for n years ...

We know that the sum for any G.P is a1((1-(r)^n)/1-r) Where r is the common ratio or w.e

so it becomes 400((1-(1+r%)^12)/1-(1+r%))
Giving you 9364.563977


For the triangle question

Part a was explained correctly .. you do the slope product = -1

For part b

You use distance fromula to find distance between BM and MC .. Given that M is the midpt so you use midpt formula which is Ax+Cx /2 same for y .. Gives you that point M is 4.5,5

So the distance between B and M is Radical 65 / 2 .. radical for 65 only

you show you get the same answer for applying it for between BM and MC ..

And now part C ..

They want the circle that passes through all of them .. It makes sense that M should be the center cause BM = MC = AM .. (remember M is the midpt of AC and you just proved BM = MC )

So the formula of the circle becomes : (x-4.5)2+(y-5)2= Part b answer ^2  ( equal to 65/4)

Simply done :D

Saladin:
Hvnt done this stuff for a long time.

MasterMath:
Anything else :) ?

Khey [Rainbow]:
lol..thanks alot for sparing ur tym wid me
nothin else..=D

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