C1 June 2012 plzzz help

[za Shadow]

C1 plzz help question 9 e
i don't understand it at all
plzz tell me how did the ms solve it :/

http://www.mediafire.com/?o1n7hoan4pa9m#69s89in22361s

 

[Alla' Abu-Sultaneh]

http://www.examsolutions.net/a-level-maths-papers/Edexcel/Core-Maths/Core-Maths-C1/C1-Papers.php

This is very helpful

 

[za Shadow]

http://www.examsolutions.net/a-level-maths-papers/Edexcel/Core-Maths/Core-Maths-C1/C1-Papers.php

This is very helpful

thank u very very much