## Solutions to GCE A-Level 2009 H2 Mathematics 9740 Paper 1 and 2

November 13, 2009Wei Jie 7 Comments »

Update:The worked solutions for the 2009 A-Level H2 Mathematics have been updated as of 14 November. Download a copy today!

Our suggested solutions to the GCE A-Level 2009 H2 Mathematics 9740 Paper 1 and 2 have been uploaded on MathsGuidebook.com.

If you happen to spot any mistake, simply leave a comment below, send an SMS to +65 8260 7772 or drop me an email to mathsguidebook (at) tanwj.net.

Enjoy!

Posted on November 13th, 2009 at 18:38

i think there’s a problem for Math paper 2, question 6 (iv), there reliability of the the prediction should be unreliable due to extrapolation, where x=2010 is out of the data set used to derive the equation

Posted on November 13th, 2009 at 18:54

there seems to be an error on the DE question for 4ii shouldnt it be multiply both sides by -0.02?

Posted on November 13th, 2009 at 19:14

DE for question 4(ii), integration should lead to both sides dividing by -50 instead of -0.02

Posted on November 13th, 2009 at 20:02

Thanks for pointing out the mistakes, I will upload a final copy with all the changes soon ðŸ™‚

Posted on November 13th, 2009 at 23:40

hey, i think for 8iii, it should be 480

we set out 4 slots for the consonants ie _ _ _ _ = 4!

then we slot the vowels into the spaces in btw, which is 5P4, then divide the 3 repeated E

=> 4!*5P4/3!=480

not sure whether it sounds logical to you but it sounds logical to me… ðŸ™‚

Posted on November 13th, 2009 at 23:46

Me:There’s something you may have missed out. If we were to choose any five slots, we may end up with two consonants next to each other.Example –

[1] L [2] V [3] T [4] D [5]

When we choose the slots 1, 2, 4 and 5, V will be next to T, such as ELEVTADE is invalid. Also, if we choose the slots 1, 3, 4, 5, such as ELVETEDA is invalid since L is next to V.

Therefore, we can only choose either 1, 2, 3, 4 or 2, 3, 4, 5. By this approach, it will be 4!*2*4!/3!

Hope this clarifies ðŸ™‚

Posted on November 14th, 2009 at 23:15

6ii)

Correlation doesn’t imply causation?