Maths, Addmaths and Statistics: Post your doubts here!

[usama321]

mmmm can u tell me how to calculate stetch factor and shear factor???

I think it was distance travlled/distance from the invariant line. the distance travelled is the distance covered by a specific point after it has undergone transformation e-g if a point had the coordinates 2,1 and after a transformation, it went to 4,1 the distance travelled would be 4-2 =2. Now lets consider the same point for the invariant line. It would be the x axis, or y=0. So the perpendicular distance from the invariant line would be 1. So overall, divide 2 by 1 and the factor would be 2. Overall, it would be a stretch of factor 2 with y=o as invariant line, parallel to x axis.

 

[asma tareen]

I think it was distance travlled/distance from the invariant line. the distance travelled is the distance covered by a specific point after it has undergone transformation e-g if a point had the coordinates 2,1 and after a transformation, it went to 4,1 the distance travelled would be 4-2 =2. Now lets consider the same point for the invariant line. It would be the x axis, or y=0. So the perpendicular distance from the invariant line would be 1. So overall, divide 2 by 1 and the factor would be 2. Overall, it would be a stretch of factor 2 with y=o as invariant line, parallel to x axis.

mmm i kinda got it but i'll try this on a question thn ask yu anyway thnx alot

 

[usama321]

mmm i kinda got it but i'll try this on a question thn ask yu anyway thnx alot

yup do try it.

 

[asma tareen]

sure

 

[Suchal Riaz]

How did you calculate the time?

as they are vertical,, the x-component of position vector will be the same. i dont remember that question exactly, it was i guess 20sin53=16km/h and 26sin22.6=10km/h
16t km= 104-10tkm
solve for t.

 

[Saad Mughal]

as they are vertical,, the x-component of position vector will be the same. i dont remember that question exactly, it was i guess 20sin53=16km/h and 26sin22.6=10km/h
16t km= 104-10tkm
solve for t.

Got it. Thanks.

 

[Suchal Riaz]

Got it. Thanks.

most of the time we get wrong answer because we start to do question as soon as we read it. for both relative velocity and permutation/combination u must read everything clearly, then create a strategy in ur mind, highlight key words such as 'wind APPEARED to be blowing FROM east' then draw a diagram correctly to help u. for permutation always check 'is there a way my solution can contain double-counting error'
spend more time in thinking before doing the question itself and believe me ur answer will always be correct(if u make so silly mistakes such as 2+2=1.5)

 

[Saad Mughal]

most of the time we get wrong answer because we start to do question as soon as we read it. for both relative velocity and permutation/combination u must read everything clearly, then create a strategy in ur mind, highlight key words such as 'wind APPEARED to be blowing FROM east' then draw a diagram correctly to help u. for permutation always check 'is there a way my solution can contain double-counting error'
spend more time in thinking before doing the question itself and believe me ur answer will always be correct(if u make so silly mistakes such as 2+2=1.5)

Yeah, it happens, you just want to get done with the question without thinking too much.
Thanks for the advice. I guess relative velocity needs the largest proportion of time in the paper.

 

[TheStallion-Reborn]

A SUGGESTION/REQUEST for anyone who posts on this thread. PLEASE do mention in your post if it's about Math's or Add maths. (Because being a dumbass at Maths, I often get heart attacks reading your queries because I've never even heard about the stuff you guys are asking, only to later figure out that it's Add-Maths...)

 

[Suchal Riaz]

A SUGGESTION/REQUEST for anyone who posts on this thread. PLEASE do mention in your post if it's about Math's or Add maths. (Because being a dumbass at Maths, I often get heart attacks reading your queries because I've never even heard about the stuff you guys are asking, only to later figure out that it's Add-Maths...)

whenever u see me, saad mughal or harith just think it is add maths coz maths is too easy to have queries

 

[Suchal Riaz]

can u please send me question number and year of paper of most challenging relative velocity and permutation/combination question whenever u see any difficult question.

 

[Saad Mughal]

can u please send me question number and year of paper of most challenging relative velocity and permutation/combination question whenever u see any difficult question.

If you're looking for challenging questions then I'll send you some from my book, they are a little harder than the past papers. As far as the classified questions are concerned, I've done permutation and combination and have found nothing very difficult but I haven't completed relative velocity so can't say about that.

 

[Suchal Riaz]

If you're looking for challenging questions then I'll send you some from my book, they are a little harder than the past papers. As far as the classified questions are concerned, I've done permutation and combination and have found nothing very difficult but I haven't completed relative velocity so can't say about that.

i have lost classified

 

[Saad Mughal]

i have lost classified

Did you completely solve it?

 

[sweetiepie]

SOLVE THE EQUATION BY QUADRATIC FORMULA​

​

2x^2 – 7x – 15 = 0​

 

[sweetiepie]

If (2 3) (a 2) = (31 1)
(4 5) (7 b) (55 3) then find a and b

Find the transpose of the matrix

A = (3 2)
(4 6)
(7 2)

In a partnership A invested Rs 8000 B Rs 6000 and C Rs 5000. If their profits total Rs 12000, how much
Each receive if the profits were divided in the ratio of their investments ?

 

[Saad Mughal]

If (2 3) (a 2) = (31 1)
(4 5) (7 b) (55 3) then find a and b

Find the transpose of the matrix

A = (3 2)
(4 6)
(7 2)

In a partnership A invested Rs 8000 B Rs 6000 and C Rs 5000. If their profits total Rs 12000, how much
Each receive if the profits were divided in the ratio of their investments ?

For the partnership question,
Ratio of investment= 8000:6000:5000
Ratio of investment=8:6:5
Converting to fractions, 8/19, 6/19, 5/19.

A receives = 8/19*12000 = Rs. 5050
B receives = 6/19*12000 = Rs. 3790
C receives = 5/19*12000 = Rs. 3160
All answers are correct to nearest 10th of a number.

The transpose of the matrix is,
(3 4 7)
(2 6 2)

 

[sweetiepie]

What is the amount of commission on sale of Rs 25000, if the rate of commission is 5% on the first Rs 15000 and 6 % on over Rs 15000?

Find The Market equilibrium point for the following supply and demand functions
Demand P = -3q + 26
Supply P = 4q – 9

 

[Saad Mughal]

If (2 3) (a 2) = (31 1)
(4 5) (7 b) (55 3) then find a and b

Find the transpose of the matrix

A = (3 2)
(4 6)
(7 2)

In a partnership A invested Rs 8000 B Rs 6000 and C Rs 5000. If their profits total Rs 12000, how much
Each receive if the profits were divided in the ratio of their investments ?

SOLVE THE EQUATION BY QUADRATIC FORMULA​

​

2x^2 – 7x – 15 = 0​

 

[Saad Mughal]

What is the amount of commission on sale of Rs 25000, if the rate of commission is 5% on the first Rs 15000 and 6 % on over Rs 15000?

Find The Market equilibrium point for the following supply and demand functions
Demand P = -3q + 26
Supply P = 4q – 9

Amount of Commission = (5/100*15000) + (6/100*10000) = 750 + 600 = Rs.1350

I don't know what that means but I guess,
-3q+26=4q-9
35=7q
q=5