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Mathematics: Post your doubts here!

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we all go through this when preparing for exams lol

since you are from saudi arabia too do you have the varient 2 paper for maths?
what variant does people in pakistan have?
 
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we all go through this when preparing for exams lol

since you are from saudi arabia too do you have the varient 2 paper for maths?
what variant does people in pakistan have?
yeah i'm having variant 2 ( which most people say is tougher than 1 )
abt pakistan i have no idea :D what, are you doing yours in pakistan?
 
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V 21
Q 18:
a) Just put '23' in the place of 'n' in the formula... use your calculator and you'll get the right answer = 4324

b) i) They already gave you the formula. Use it along with the formulas on the top of the page in your calculator and you'll get your answers.
ii) If you find the values of U1, U2 and U3... you'll notice they go like 4, 9 and 16 respectively. These numbers are all SQUARES. Furthermore, the first square is 4 when it should be 1 IF you use the formula n^2
Keeping that in mind, you have to make a slight modification to the formula and write it as (n+1)^2.

c) This one requires some brain:
Notice that:

V1 = 4*T1
V2 = 4*T2
V3 = 4*T3

So you can say

Vn = 4*Tn
Tn as given above is (1/6)n(n+1)(2n+1)

So replace it in the equation:
Vn = 4*Tn
Vn = 4* (1/6)n(n+1)(2n+1)
Vn = (4/6)n(n+1)(2n+1)
Simplify and you get your answer:

(2/3)n(n+1)(2n+1) :)


Hours = 8.5
Bus leaves every 0.25 hours
Number of times bus leaves = 8.5/0.25 = 34
In the end, it leaves ONCE AGAIN at 17.30

34 + 1 = 35 :D

thx bro ....
 
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you just inverse it by finding the determinant of the matrix which is (2x3-1x4) and then we write the answer as 1/the determinant
we then multiply the 1/determinant with the matrix but we must switch 2 and 3 location and add negative to 1 and 4 so it becomes
1/2 times The New matrix which is = (3 -1)
(-4 2)
 
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yup same here i have mine at 11 in manarat
manarat in jeddah or riyadh ?
people in riyadh have am session for sciences while i have evening session :D
for me my school will be my centre
you just inverse it by finding the determinant of the matrix which is (2x3-1x4) and then we write the answer as 1/the determinant
we then multiply the 1/determinant with the matrix but we must switch 2 and 3 location and add negative to 1 and 4 so it becomes
1/2 times The New matrix which is = (3 -1)
(-4 2)
too late :p
 
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manarat in jeddah or riyadh ?
people in riyadh have am session for sciences while i have evening session :D
for me my school will be my centre

nope manarat al khobar :D huh science on the same day :O my first science (physics) is nextteusday with ppr 4 for math
 
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