IGCSE MATHS Doubts

[Vin]

can u explain it .....y is da scale factoe -ve wen we move da image to left.....nd is this rule same 4 all quadrants? wat abt 3rd quadrant......wat if da image is on x-axis.....nd wat abt stretch( wen is its scale factor -ve).....thnkx.

actually even im kinda confused regarding this topic ..   
the thing is i saw this rule noted in my text book while referring it ..
my teacher might hav told it in class ..
i hav emailed her about this i should get her reply soon .. 

[astarmathsandphysics]

If this is about negative scale factors, this is one of the things I have to do on my website. A lot has gone wrong in last few days. I had to recover a hard disk with the vital data.

[Vin]

Thank you .. im looking forward to have them

[PeaceMaker]

Could someone be kindly to explain to me the upper bounds and lower bounds in detail? Im kinda am confused about them, but if you have notes about them then feel free to pass them on to your fellow SF mate.

[astarmathsandphysics]

astarmathsandphysics.com>igcse maths notes>maximising and minising

[Vin]

Could someone be kindly to explain to me the upper bounds and lower bounds in detail? Im kinda am confused about them, but if you have notes about them then feel free to pass them on to your fellow SF mate.

ALWAYS remember ..

for addition and multiplication ..

LB = LB + LB

LB = LB x LB

UB = UB + UB

UB = UB x UB

for subtraction or division .. (is different)
LB = LB - UB

LB = LB/UB

UB = UB - LB

UB = UB/LB 

consider solving some sums u'll get them  .. these kinda ques usually appear in paper 2 .. (jus solved a couple of them few mins ago)

[Dark Prince]

actually even im kinda confused regarding this topic ..   
the thing is i saw this rule noted in my text book while referring it ..
my teacher might hav told it in class ..
i hav emailed her about this i should get her reply soon .. 

thnkxx....

[Fastal]

2005 Oct/Nov
Paper 4, IGCSE

2(d)(iii)
I don't understand how you find the invariant line.

[Snake]

Which Paper?

[Fastal]

Another transformation question

3(a)(iv)[2005 June Paper 4(Igcse)]

How do you find the invariant line for the shear?


I actually have this doubt with stretch and shear(finding invariant line), when the image and object share no points.

[Vin]

2005 Oct/Nov
Paper 4, IGCSE

2(d)(iii)
I don't understand how you find the invariant line.

it might take me a lot of time .. havta solve the whole ques!!

[Vin]

2005 Oct/Nov
Paper 4, IGCSE

2(d)(iii)
I don't understand how you find the invariant line.

About invariant lines .. for stretch, the transformation takes place perpendicular to the invariant line ..

[ksitna]

how to simplify

x-3= 4
4     x-3

[Vin]

how to simplify

x-3= 4
4     x-3

sorry i didnt get the ques

[@d!_†oX!©]

is it,
(x-3)/4 = 4/(x-3)
then,
=> (x-3)(x-3) = 4*4
=> x² -6x +9 = 16
=> x² -6x -7 = 0
=> (x+1)(x-7) = 0
=> x = -1 , x = 7