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Mathematics: Post your doubts here!

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bakhita

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Hassan Ali Abid said:
Im trying to open the link but its not working for me ...anyways can you please have a look in to that book and lemm know if itcontains the probability using sets and venn diagrams

yeah please do search..it will surely be a great favour.
Click to expand...

For solved past papers, I did search, but they really aren't available online yet...A few sites are updating solved papers, but as I told you, there really is no chance for S2,...I found solved ones for Mechanics, and many other subjects, but no Statistics :(....

Probability using venn diagram is explained in the book, but that's only for understanding of 'combined events' and mutually exclusive events etc, but there is no practice for these...it would be better if you have a look at the book yourself... the link doesn't work? :eek: works fine for me though..okay try to open this:
http://www.aliensservices.com/A_Level_Books.html
 
Hassan Ali Abid

Hassan Ali Abid

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bakhita said:
For solved past papers, I did search, but they really aren't available online yet...A few sites are updating solved papers, but as I told you, there really is no chance for S2,...I found solved ones for Mechanics, and many other subjects, but no Statistics :(....

Probability using venn diagram is explained in the book, but that's only for understanding of 'combined events' and mutually exclusive events etc, but there is no practice for these...it would be better if you have a look at the book yourself... the link doesn't work? :eek: works fine for me though..okay try to open this:
http://www.aliensservices.com/A_Level_Books.html
Click to expand...

Then isnt there any other book having explaining everything with solved/worked examples ??

the link opens and all I can see is the page loading but not opening.
 

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Hassan Ali Abid

Hassan Ali Abid

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Anum96 said:
No. It wouldve been easier with a substitution though.
But The reason is that d(arctan x)/dx = 1/(1+x^2)

and the integral is the opposite of the derivative
Click to expand...

but how is it possible to solve that with substitution ? and which substitution will be used?
 
Anum96

Anum96

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Hassan Ali Abid said:
but how is it possible to solve that with substitution ? and which substitution will be used?
Click to expand...
If you applied the correct identity it might help . . . tan2(x)+1=sec2(x) Your integral equation then becomes, ∫1x2+1dx=∫dθ

^^This is what a teacher said. :confused:
 
Anum96

Anum96

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Sarosh Jameel said:
PLZ help me with part 2 !!
Click to expand...
ii)Take 2 out.

2 ʃ ((2-u)^2 / u) du

Solve the square.

2 ʃ (4 - 4u +u^2)/u

Make fractions.

2 ʃ 4/u – 4u/u + u^2 /u)

Cancelling out will give you.

2 ʃ 4/u – 4 + u

Now integrate.

2 [ 4ln IuI – 4u + u^2/2 ]

8ln IuI - 8u + u^2

Plug in the limits.

(8ln I2I – 8(2) + (2^2)) – (8ln I1I – 8(1) + 1^2)

(8ln I2I – 16 + 4) – (0 – 8 + 1)

(8ln I2I – 12) – ( - 7)

8ln I2I - 12 + 7

8ln I2I – 5 Ans.
 
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