Author Topic: IGCSE MATHS Doubts  (Read 130447 times)

Offline Vin

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Re: IGCSE MATHS Doubts
« Reply #750 on: May 16, 2010, 11:38:19 am »
Help! :(
Maths (IGCSE)
May June 2000
Q1.
(a) (i) (ii) (iii)
(b)

How do you find them?  :-\

gimme some time .. i'll explain u with the diag .. ;)

Offline nanotaha

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Re: IGCSE MATHS Doubts
« Reply #751 on: May 16, 2010, 11:39:40 am »
 ;D
thanks!

Offline Vin

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Re: IGCSE MATHS Doubts
« Reply #752 on: May 16, 2010, 11:40:29 am »
my teacher solved sum pastpapers 4 us n this wz 1 of thm! so c if u can understnd 4rm tht n +rep if thts helpful!!

avoid asking for rep .. ;) ;) you'll get it if u deserve it .. ;) ;D

Offline princess12

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Re: IGCSE MATHS Doubts
« Reply #753 on: May 16, 2010, 11:41:32 am »
because i think the syallbus is different
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Offline Baladya

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Re: IGCSE MATHS Doubts
« Reply #754 on: May 16, 2010, 12:07:47 pm »
avoid asking for rep .. ;) ;) you'll get it if u deserve it .. ;) ;D

And its against the rules and look stupid :D
Looks like i ran out of cool signatures :|

Offline Vin

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Re: IGCSE MATHS Doubts
« Reply #755 on: May 16, 2010, 12:18:09 pm »
Help! :(
Maths (IGCSE)
May June 2000
Q1.
(a) (i) (ii) (iii)
(b)

How do you find them?  :-\

SORRY FO THE DELAY !! .. my computer shut down unexpectedly and had to type ALL of this again !! =@
also dunno if the diag might help much..

For these types of sums always remember “y-intercept” ( c )

y = mx + c

this is a common equation for all equations of graphs ..
y-intercept means where the equations ‘cuts’ the y-axis

in this one y= x + 2 .. it cuts at 2 .. u got 1.a)  ;)

so the coordinates of P  would be (0,2)

for ii)  if u notice Q is at y=0

so substitute 0 in 3x + 4y = 22  to find x

tht would be
3x  + 4 x 0 = 22
3x = 22
x = 7.3

so coordinates of Q = (7.3 , 0)

iii) for this R is the intersection .. so tht means at tht point BOTH the equations should be equal ..
so y = x+2 (eqn1)  would be equal to 3x  + 4y = 22 (eqn2)
so lets find the y for R ..
rearrange 3x  + 4y = 22 to
y = 22 – 3x
     ---------
         4
As eqn1 = eqn2
   22 – 3x
 ----------  = x + 2
       4
22 – 3x = 4x + 8
7x =14
X = 2

Now put “x=2” in any of the eqn ..

U’ll get y =4

so coordinates for R = (2 , 4)


b) is a direct question .. u hav to state some inequalities that lie in the region OPRQ.

y >= 0
y =< x + 2
3x + 4y =< 22

Define this region .. for this u need understand the concept .. two eqns are already given .. the region is ‘less than’ both of them .. third would be
y >= 0 there is no negative quadrant


..
« Last Edit: May 16, 2010, 12:46:18 pm by ~VIN1094~ »

Offline princess12

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Re: IGCSE MATHS Doubts
« Reply #756 on: May 16, 2010, 12:29:29 pm »
can any 1 explain me transformation
urgently please fast
  ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ???
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Offline Vin

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Re: IGCSE MATHS Doubts
« Reply #757 on: May 16, 2010, 12:31:17 pm »

a lot to explain .. want something in specific ??

Offline Dibss

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Re: IGCSE MATHS Doubts
« Reply #758 on: May 16, 2010, 12:35:55 pm »
can someone please explain how to fully describe a shear and stretch with reference to any pastpaper qs if possible?

Offline princess12

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Re: IGCSE MATHS Doubts
« Reply #759 on: May 16, 2010, 12:37:55 pm »
yes ok can u explain me in a something specific ok
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Offline Ghost Of Highbury

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Re: IGCSE MATHS Doubts
« Reply #760 on: May 16, 2010, 12:38:41 pm »
For shear, u gotta mention the shear factor and the invariant line. If asked, the matrix transformation too.
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Offline diva_sparkles

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Re: IGCSE MATHS Doubts
« Reply #761 on: May 16, 2010, 12:40:31 pm »
For shear, u gotta mention the shear factor and the invariant line. If asked, the matrix transformation too.

u can also say whthr da image moved towards rite or left!
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Offline princess12

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Re: IGCSE MATHS Doubts
« Reply #762 on: May 16, 2010, 12:42:49 pm »
can any 1 explain me transformation
urgently please fast
 ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ???
We should be kind to after teachers

Offline Vin

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Re: IGCSE MATHS Doubts
« Reply #763 on: May 16, 2010, 12:45:12 pm »
can any 1 explain me transformation
urgently please fast
 ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ???

i asked u .. do u want something in specific ?? theres a lot im transformation .. wat dou want definition ..?/ types  >>?

Offline diva_sparkles

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Re: IGCSE MATHS Doubts
« Reply #764 on: May 16, 2010, 12:46:51 pm »
Don’t ask what the world needs. Ask what makes you come alive, and go do it. Because what the world needs is people who have come alive!!