Maths, Addmaths and Statistics: Post your doubts here!

[AhsanAfzal]

is there any other important formula we have to learn??

 

[Saad Mughal]

the first difference is 6-2 =4 ok but why is the second difference = 2...shouldnt it be 12 - 6 = 6???

d2 is the difference addition, this means that d2 = how much difference is increasing after each term.

 

[sourov97]

d2 is the difference addition, this means that d2 = how much difference is increasing after each term.

got it!..thanks...but can u help me with how to find matrix from given coordinates of image and object?

 

[Saad Mughal]

got it!..thanks...but can u help me with how to find matrix from given coordinates of image and object?

Well, if the object is (x , y) <-- This is a column vector (suppose) then (x,y) * matrix = (x',y'), where (x',y') is column vector of the image. This is the normal method of finding the IMAGE from the matrix. I don't know how the reverse works. I guess that you just have to figure out the matrix from the given description.

 

[Saad Mughal]

is there any other important formula we have to learn??

Not that I know of.

 

[sourov97]

Well, if the object is (x , y) <-- This is a column vector (suppose) then (x,y) * matrix = (x',y'), where (x',y') is column vector of the image. This is the normal method of finding the IMAGE from the matrix. I don't know how the reverse works. I guess that you just have to figure out the matrix from the given description.

its okay!...so u mean Object * Matrix = Image....and yeah...if this is the formula then i can find the matrix by using inverse!..but i was confused whether it was M * O = I...
Thanks...

 

[Saad Mughal]

its okay!...so u mean Object * Matrix = Image....and yeah...if this is the formula then i can find the matrix by using inverse!..but i was confused whether it was M * O = I...
Thanks...

How will you find the inverse of a 2*1 order matrix.

 

[AhsanAfzal]

its okay!...so u mean Object * Matrix = Image....and yeah...if this is the formula then i can find the matrix by using inverse!..but i was confused whether it was M * O = I...
Thanks...

we have to do transformation matix*column matrix of coordinates for image, or column matrix of coordinates*matrix?

 

[robinhoodmustafa]

Not that I know of.

Saad.
Please can u list all the Matrix for shear, stretch,enlargement etc and the formula to find out the K factor

 

[AhsanAfzal]

https://www.xtremepapers.com/community/threads/transformation-please-help.17331/#post-316620

 

[sourov97]

we have to do transformation matix*column matrix of coordinates for image, or column matrix of coordinates*matrix?

transformation matrix * object coordinate matrix = image matrix

 

[sourov97]

How will you find the inverse of a 2*1 order matrix.

which one is 2*1 matrix..they are all 2*2 matrix...

 

[fatima0000]

http://papers.xtremepapers.com/CIE/...Calculator Version) (4024)/4024_s12_qp_21.pdf
Q 10 (a)

 

[sourov97]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s12_qp_21.pdf
Q 10 (a)

length of one side of square = 10 - x (as x + length of square = 10)
so V = area of square * length of cuboid
y= (10 - x)^2 * x
y= (100 - 20x + x2 )* x
y= x3 - 20x2 +100x

 

[Saad Mughal]

which one is 2*1 matrix..they are all 2*2 matrix...

Column vectors are 2*1 matrices.

 

[sourov97]

Column vectors are 2*1 matrices.

u didnt get what i meant!...i meant if i have 2 coordinates of an object and an image...or i just know the transformation....then i can just turn them into 2 * 2 matrix of object and then multiply its inverse with the 2 * 2 matrix of image....i will get the transformation matrix!

 

[shahzadi afia]

u didnt get what i meant!...i meant if i have 2 coordinates of an object and an image...or i just know the transformation....then i can just turn them into 2 * 2 matrix of object and then multiply its inverse with the 2 * 2 matrix of image....i will get the transformation matrix!

yeah!..u r right!..

 

[Saad Mughal]

u didnt get what i meant!...i meant if i have 2 coordinates of an object and an image...or i just know the transformation....then i can just turn them into 2 * 2 matrix of object and then multiply its inverse with the 2 * 2 matrix of image....i will get the transformation matrix!

Yeah. You can do that too

 

[sourov97]

Yeah. You can do that too

how was ur exam!..hard or easy!

 

[Saad Mughal]

how was ur exam!..hard or easy!

Easy. I lost 1 mark because I didn't recheck properly. My distinction is gone for good. How about you?