Mathematics: Post your doubts here!

[smartangel]

please tell me how do we know whats the starting value?? Q4ii..http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_32.pdf

 

[Mustehssun Iqbal]

Whats this ?
LAte and stuff, never heard of it !

Some method of recognizing which one is u and which one v dash in integration by parts...
Suppose there's lnx.x and you've to integrate it.
There you have a logarithm and airthematic value. So in the word " L A T E " L (logarithm ) comes first and A(airthematic ) comes after it. So lnx(logarithimic ) is u and x(airthmatic ) is vdash.
Another example: Suppose there is cosx.2x and you have to integrate it by parts. There is one airthematic term and the other one trignometric term. In "L A T E " , A (airthemitc) comes before T (trignometric ) . So 2x becomes u and cosx becomes vdash. The letter that comes first is u and the one that comes after it is vdash.

 

[smzimran]

something like modulus of ax shud be less than 1 in expansion (1+ax)^n

If |ax| < 1 , the number of terms will be infinite.
I think that was it

 

[aliya_zad]

please tell me how do we know whats the starting value?? Q4ii..http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_32.pdf

If starting value's not given u can start off with a random value like 1..it'll converge to the same answer!

 

[smzimran]

Some method of recognizing which one is u and which one v dash in integration by parts...
Suppose there's lnx.x and you've to integrate it.
There you have a logarithm and airthematic value. So in the word " L A T E " L (logarithm ) comes first and A(airthematic ) comes after it. So lnx(logarithimic ) is u and x(airthmatic ) is vdash.
Another example: Suppose there is cosx.2x and you have to integrate it by parts. There is one airthematic term and the other one trignometric term. In "L A T E " , A (airthemitc) comes before T (trignometric ) . So 2x becomes u and cosx becomes vdash. The letter that comes first is u and the one that comes after it is vdash.

Oh, thats a good strategy but i never need help in that i am always able to decide that but that may come of aid, so i will memorise it!

 

[smzimran]

please tell me how do we know whats the starting value?? Q4ii..http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_32.pdf

Use pie

 

[smartangel]

Use pie

so how do we figure out for a different question?

 

[1357913579]

Some method of recognizing which one is u and which one v dash in integration by parts...
Suppose there's lnx.x and you've to integrate it.
There you have a logarithm and airthematic value. So in the word " L A T E " L (logarithm ) comes first and A(airthematic ) comes after it. So lnx(logarithimic ) is u and x(airthmatic ) is vdash.
Another example: Suppose there is cosx.2x and you have to integrate it by parts. There is one airthematic term and the other one trignometric term. In "L A T E " , A (airthemitc) comes before T (trignometric ) . So 2x becomes u and cosx becomes vdash. The letter that comes first is u and the one that comes after it is vdash.

I use the same bro its called ILATE I for inverse

 

[smzimran]

so how do we figure out for a different question?

Use any value, they all wil converge !

 

[smartangel]

Use any value, they all wil converge !

okay thanks!

 

[Mustehssun Iqbal]

I use the same bro its called ILATE I for inverse

great
btw what's inverse?? Does it come in questions??

Oh, thats a good strategy but i never need help in that i am always able to decide that but that may come of aid, so i will memorise it!

then how else were you doing these questions??
waoww I knew something in Maths that you didn't. feels honoured

 

[Aarjit]

Whats this ?
LAte and stuff, never heard of it !

Seriously? try "I LATE" (think that you're always late at learning maths! )

in ∫ u.v'(x)dx = u.v − ∫ u'(x).v dx,"u" will take the expression in the following oder:
a
I - Integration (~ by parts)
L - Logarithmic (e.g. lnx, logx)
A - Algebraic (e.g. x^2, 2x)
T - Trigonometric (tanx, secx)
E - Exponential (e^x)

 

[smzimran]

Seriously? try "I LATE" (think that you're always late at learning maths! )

in

,"u" will take the expression in the following oder.
I - Integration
L - Logarithmic (e.g. lnx, logx)
A - Algebraic (e.g. x^2, 2x)
T - Trigonometric (tanx, secx)
E - Exponential (e^x)

Haha, got it!
Thanks

 

[smzimran]

great
btw what's inverse?? Does it come in questions??

then how else were you doing these questions??
waoww I knew something in Maths that you didn't. feels honoured

I could easily figure out which to take as u
I solved ten years papers never had any problems!
Thats great iam happy you had this 'honour'

 

[hassam]

If |ax| < 1 , the number of terms will be infinite.
I think that was it

no....it was other way around.....bt dont knw what its purpose and use in questions....

 

[smartangel]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_31.pdf
plz help me with question 8..the only thing i know in this is the modulus

 

[smzimran]

no....it was other way around.....bt dont knw what its purpose and use in questions....

I have quoted from the notes, it is correct, but yes never found it purposeful so forget it,
Btw hows prep? and u giving 32 ?

 

[zarasattar]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s10_qp_31.pdf
Please help me out with Q 4 i

 

[smzimran]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s10_qp_31.pdf
Please help me out with Q 4 i

Have you expanded cos(3x − x) and cos(3x + x) ???

 

[smartangel]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_31.pdf
Q8. got the first part..plz explain ii and iii..pleaseee.