[CIE] All Pure Mathematics (P1, P2 and P3) doubts here !

[Arthur Bon Zavi]

i know,tbh all the pure is a piece of cake,but there are always some questions that need thinking,i got 69/75 in this papers and i finished it in 1hour 10 mins,my biggest problem is signs,esp in binomial series :S

That is a pitfall for getting 69. Think on the question and revise till the end of second. Make it near 1 hr 30 m, and 15 m for revision. I am sure you will get 75 except for those silly mistakes.

[HUSH1994]

same here,all my mistakes are signs and so,but if i concentrate i dont think a 75 would be hard

[bulono]

May/june 2010 question 1...help

[elemis]

May/june 2010 question 1...help

Which variant ?

[physichemaths]

help me with question 7 november 2010 paper 13. part iii)

[elemis]

help me with question 7 november 2010 paper 13. part iii)

Determine the range of the f(x) for the individual functions.

This will be the domains for the inverse of each individual function.

[$H00t!N& $t@r]

question! o/n 2009 12 q4(ii)
http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w09_qp_12.pdf

[elemis]

question! o/n 2009 12 q4(ii)
http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9709%20-%20Mathematics/9709_w09_qp_12.pdf

Draw it step by step.

Sin x :  Fig.1


Sin 2x (there will be one complete sine curve in the 0-pi domain): Fig. 2

-3sin(2x) [reflect the curve in the x axis and stretch it by a factor of three] : Fig 3.

5 -3sin(2x) [translate the whole curve in the positive direction by 5 units] : Fig 4.

[Arthur Bon Zavi]

Draw it step by step.

Sin x :  Fig.1


Sin 2x (there will be one complete sine curve in the 0-pi domain): Fig. 2

-3sin(2x) [reflect the curve in the x axis and stretch it by a factor of three] : Fig 3.

5 -3sin(2x) [translate the whole curve in the positive direction by 5 units] : Fig 4.

Which software did you use for sketching those ?

[elemis]

Which software did you use for sketching those ?

MS Word 2007. There's a math Plug-in you get. You used to get it for free (which is how I got it), but now you have to pay.

[Arthur Bon Zavi]

MS Word 2007. There's a math Plug-in you get. You used to get it for free (which is how I got it), but now you have to pay.

Okay.

[$H00t!N& $t@r]

thanks ari for the detailed answer. +rep  

[physichemaths]

Determine the range of the f(x) for the individual functions.

This will be the domains for the inverse of each individual function.

part iii?

[I Jimmy I]

Hello, ok I have a doubt in the 2nd question....

I know we have to use the "b²-4ac" method to arive with k²+4k-12=0

And I already got the answer as k=2 and k=-6
But in the Marking Scheme it says k>2 and k<-6
So how do I know which sign to use for which number.... I mean in the exam how should I know its k>2 not k>-6 and vice versa. Could some1 explain..?

Thank You

[I Jimmy I]

Ok so I found a solution which is to take values above and below 2 as well as above and below -6 then check if its greater than 0 or not.

So I should take the range of values which give an answer of >= 0? If this is correct plz confirm

TYVM