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HELPHELPHELPHELPHELP! I HAVE EXAMS TOMORROW!

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Galleria:
HI
HELP
I HAVE MATH PAPER 2 TOMORROW
AND I AM UNABLE TO DO THESE QUESTIONS

Math, Paper 2:

M/J 2003 Q 17
M/j 2006 Q 14, 26
O/N 2007 No 15
O/N 2008 no 17
HELPHELPHELP
I DONT GET IT
>___<
and i dont get vectors : |

Ivo:

--- Quote from: Galleria on October 31, 2010, 09:03:59 am ---O/N 2008 no 17

--- End quote ---

a) i) Basically it's asking .  So .

    ii) Applying the same principle, .
 
    iii) , which simplifies to .

Ivo:

--- Quote from: Galleria on October 31, 2010, 09:03:59 am ---O/N 2007 No 15

--- End quote ---

a) We know that essentially has 6 units, so of 6 is 2, so is 2 units 'up' .  Similarly, has 6 units, so of 6 is 4, so is 4 units along direction .  Answer attached.

b) Applying the same principle, then is .

c) Same principle, but now going in direction, so .

Hope that clears up your doubt! 8)

Arthur Bon Zavi:

--- Quote from: Galleria on October 31, 2010, 09:03:59 am ---HI
HELP
I HAVE MATH PAPER 2 TOMORROW
AND I AM UNABLE TO DO THESE QUESTIONS

Math, Paper 2:

M/J 2003 Q 17
M/j 2006 Q 14, 26
O/N 2007 No 15
O/N 2008 no 17
HELPHELPHELP
I DONT GET IT
>___<
and i dont get vectors : |


--- End quote ---

first read this:

https://studentforums.biz/math-147/transformation-martices-igcse/ (Reply 2)

M/J 2003 Q 17

in (A) you have to draw the shear, i.e the point (0,2) should map onto point (3,2).
in (b)(i) you have to stretch the shear at the given point. This is one way stretch, know the matrix from the site above.
in (b)(ii) you have to write the matrix of the stretch (Before that look at the above site).

Arthur Bon Zavi:

--- Quote from: Galleria on October 31, 2010, 09:03:59 am ---
M/J 2006 Q 14, 26


--- End quote ---

(14)(a) 44 : 32 = 11 : 8, i.e 1.375 . This is increased by 5 : 4, i.e 1.25.
Therefore, 44 * 1.25 = 55 and 32* 1.25 = 40.

Therefore measurements of the larger screen is 55 cm and 40 cm.

(14)(b) Model A screen area     44 X 32      1408       16
            ----------------------- = --------- =  ------ = ------
            Model B screen area     55 X 40      2200        25

(26) Sorry but Q-26 does not exist.

Hope this was been of help. ;)

Don't worry.

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