Mathematics: Post your doubts here!

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

The first matrix is of the order 3 x 2. The second matrix is of the order 2 x 4. The order of the product matrix will thus be 3 x 4.
If two matrices of orders p x q and q x r are being multiplied, the order of the product matrix is always given by p x r.

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

ohhh...i get it. thanks alot. actually i switched it up. the answer was 3x4 but i wrote 4x3 XD well, thanks again. :good:

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

http://www.xtremepapers.me/CIE/Cambridg ... 7_qp_4.pdf

Question 2 Part (f)(iii). Help needed. Thanks.

 

[Abid357]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Salaam Math_angel . My first question of the day : P

http://www.xtremepapers.me/CIE/index.ph ... _qp_22.pdf

Qns. 21 (b)... the answer I get is 480, the answer in the marking scheme is 960. After doing 3 papers in a row I was still fine, until I hit THIS question which gave me a very bad headache...

Your help will always be appreciated.

 

[Abid357]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

http://www.xtremepapers.me/CIE/Cambridge%20IGCSE/0581%20-%20Mathematics%20Extended/0581_s07_qp_4.pdf

Question 2 Part (f)(iii). Help needed. Thanks.

The matrix is:

(1 0)
(1 1)

They ask you to find the transformation that maps the image triangle onto the real triangle (object). It is shear with scale factor +1 and y-invariant line.

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Salaam Math_angel . My first question of the day : P

http://www.xtremepapers.me/CIE/index.ph ... _qp_22.pdf

Qns. 21 (b)... the answer I get is 480, the answer in the marking scheme is 960. After doing 3 papers in a row I was still fine, until I hit THIS question which gave me a very bad headache...

Your help will always be appreciated.

The car travels faster than the truck from time 15s to 55s. The distance travelled by the car is the TOTAL area under the graph during this time. You are missing one point here. The calculation would be like this: [1/2 x (55-15) x (36-12)] + [(55-15) x (36-12)].
I think you can figure it out now.

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

But how do you find that matrix??
(1 0)
(1 1)???

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

The matrix remains the same except that the number representing the shear factor (in the matrix) is multiplied by - 1 to give the aforementioned matrix. Btw, you have to learn the main transformation matrices.

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

What are the main transformation matrices???

 

[boodi196]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

When thy tell you to simplify as much as possible, they mean expand or factorize? Or does it not matter?

 

[anonymous123]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

0580_s10_qp_22 Question 5
I can determine the answer mentally but I cant find the proper method in my textbook.PLZ EXPLAIN ????

 

[abcde]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

0580_s10_qp_22 Question 5
I can determine the answer mentally but I cant find the proper method in my textbook.PLZ EXPLAIN ????

Kindly post the link of the paper. (never forget doing that )

 

[anonymous123]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

0580_s10_qp_22 Question 5
I can determine the answer mentally but I cant find the proper method in my textbook.PLZ EXPLAIN ????

Kindly post the link of the paper. (never forget doing that )

http://www.xtremepapers.me/CIE/Cambridg ... _qp_22.pdf

 

[pprgeek]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Salaam all !!
Hope everyone is havin a cool day

Just have little kiddish doubts. Like how to factorise x^2 - 4
It will be appreciated if further examples are given.

Some other doubts are:-
Q16
Paper 2 :http://www.xtremepapers.me/CIE/Cambridge IGCSE/0581 - Mathematics Extended/0581_w10_qp_22.pdf

Good luck for all thos havin a Maths paper tommorow like me.
Wish me luck too !!

 

[anonymous123]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

Salaam all !!
Hope everyone is havin a cool day

Just have little kiddish doubts. Like how to factorise x^2 - 4
It will be appreciated if further examples are given.

Some other doubts are:-
Q16
Paper 2 :http://www.xtremepapers.me/CIE/Cambridge IGCSE/0581 - Mathematics Extended/0581_w10_qp_22.pdf

Good luck for all thos havin a Maths paper tommorow like me.
Wish me luck too !!

x^2-4
Following a^2-b^2 :
(x-2)(x+2)

 

[TSZ]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

well chantoo pantoo...for ure question
2^8 x 8^2 x 4^-2
2^8 x (2^3)^2 x (2^2)^-2
2^8 x 2^6 x 2^-4
2^8+6+(-4)
2^10
hope u get what i wrote over here x means multiplication

and pprgeek
(a) (16/81 x^16)^1/2
square root (16/81) and x^16*1/2
u'll get 4/9 x^8
(b) 16 y^10*4 y^-4/32 y^7
16 * 4 /32 * y^10+(-4) -7
2y^-1
hope you also get what i wrote over here x is the unknown and * stands for multiplication

 

[WayneRooney10]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

http://www.xtremepapers.me/CIE/Cambridg ... 7_qp_4.pdf

Question 7. Tough question. Help required. Thanks

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

http://www.xtremepapers.me/CIE/Cambridg ... _qp_32.pdf
igcse 0580mj10 p22
q15cii the c intercept is not coming right.
q16
q17b
thanks

 

[TSZ]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

student92 ure link is of a ppr 3, plzzz post the correct link thnku

 

[student92]

Re: Maths made easy =) stuck sumwhere?Ask ur doubts here!!

http://www.xtremepapers.me/CIE/Cambridg ... _qp_22.pdf
igcse 0580mj10 p22
q15cii the c intercept is not coming right.
q16
q17b
thanks