2004 Paper 2, Q9
Posted 04 May 2006 - 03:27 PM
Part B is to find the exact value of x for which this volume is a maximum.
I understand i have to differentiate, set equal to zero to find stationary points, draw a max/min graph to find where x is at its maximum but im struggling with the differentiation, im getting funny numbers.
I would be really grateful for any help.
Posted 04 May 2006 - 04:03 PM
factorised to 2(x[^2] - 4) , therefore getting roots of plus or minus 2
for my nature table, i had m max tp at -2 where y= 0.77 and max tp at 2 where y= 4.47
i dont have my answers handy though, so i'm not sure if that's right :S
Posted 04 May 2006 - 04:14 PM
ooooh i get it now i think, was just the differentiation part that i was confussed with. thanks.
Posted 04 May 2006 - 09:11 PM
Posted 04 May 2006 - 09:25 PM
Posted 04 May 2006 - 11:42 PM
/me really hates drawing nature tables
Posted 04 May 2006 - 11:50 PM
If i am not here i am somewhere else
Posted 05 May 2006 - 04:04 PM
Yeah should have mentioned that. Im not sure if using this method would get you no marks but to be sure I would use a nature table
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