Mathematics: Post your doubts here!

[rida.12.!!]

hey!!!
silly question but if someone can tell me how to do it
question 11,15,16,18 ,19,21,23 & 26 in the file that i attached!!!
thanks

 

[rida.12.!!]

http://olevel-alevel.blogspot.com/2014/02/october-november-2013-past-papers-of-o.html

ummmm.. 0580 plz

 

[exploded diper]

http://ciestudy.blogspot.com/2014/03/download-igcse-mathematics-0580-octnov.html

 

[rida.12.!!]

http://ciestudy.blogspot.com/2014/03/download-igcse-mathematics-0580-octnov.html

thx a lot

 

[exploded diper]

thx a lot

no prob..............................

 

[rida.12.!!]

no prob..............................

could you just do me an another favour
it's silly but ,.......
heyy!!
if you can tell me how to do it
question 11,15,16,18 ,19,21,23 & 26 in the file that i attached!!!
thanks

 

[exploded diper]

could you just do me an another favour
it's silly but ,.......
heyy!!
if you can tell me how to do it
question 11,15,16,18 ,19,21,23 & 26 in the file that i attached!!!
thanks

cant open file.... gimme the link of the paper

 

[rida.12.!!]

cant open file.... gimme the link of the paper

i can't find the link i'll tell you the paper
0580 paper21 may/june 2013

 

[rida.12.!!]

cant open file.... gimme the link of the paper

oh !!! here...I found the link!!
hope you can help!!
http://www.examtestprep.com/CIE/IGC...-21-Summer-2013.html#pdfsection_937b48-page_1
thx

 

[rida.12.!!]

cant open file.... gimme the link of the paper

a little faster plz!!

 

[rida.12.!!]

a little faster plz!!

anyoneeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!
plzzzzzzzzzzzzzzzzzzzzzzzzz!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

[dubi2pro]

hows it 1275 and 1425?

i did 85 x 1500 and 95 x 1500

whats the isssue!

 

[dubi2pro]

Okay i got the B INVERSE
then whats BB INVERSE?

 

[dubi2pro]

23, (c)

 

[3abder7man]

23, (c)

Okay i got the B INVERSE
then whats BB INVERSE?

It's just B inverse multiply B. Anything multiplied by its inverse gives the identity matrix:

10
01

That's why it's one mark

 

[dubi2pro]

It's just B inverse multiply B. Anything multiplied by its inverse gives the identity matrix:

10
01

That's why it's one mark

Oh yes! thanks!

 

[3abder7man]

Oh yes! thanks!

welcome

 

[dubi2pro]

what abt this?

 

[Wasif Hassan]

Can anyone solve just (iii) and (iv)??
I need the anwser immediately!
[email protected]

 

[3abder7man]

anyoneeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee!!!!!!!!!!
plzzzzzzzzzzzzzzzzzzzzzzzzz!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

for 11 you will multiply 12 with 1/3 and make 27^1/3
for 15 you have the volume and the pie and the 4/3 cant you get the radius????????????
for 16 first you will get the volume of the cylinder and you wand 1liter which is 1000cm3 so you will divide 1000 with the area of the cylinder

Those are for 11, 15, and 16. Now the rest.

18 is quadratic factorization. Get two numbers that multiply to give -30 and add up to give 1 (coz it's 1 x). In that case it's -5 and 6, and so it becomes (x-5)(x+6). In part B you are supposed to realize that the expression you factorized in part A can be cancelled with the the numerator. In this case the (x-5)s cancel out each other.
19 Inverse variation means that t= k/(u^2). Putting in the numbers given, you should be able to calculate K and be able to work out any numbers given.
21 You calculate the length of the curved line / arc as a fraction of the total circle circumference, so it would be (135/360) * 2 * pi * (12^2) and then add it to the lengths of the radii.
23 You first calculate EA using pythagoras theorm. It would give you 13cm. then use EA and AC to calculate EC (again using pythagoras theorm)
26 The total surface area is just the area of all surfaces (all polygons that make the face of the object). That should be easy!