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2001 - Paper 2 - Question 8 - HSN forum

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2001 - Paper 2 - Question 8


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#1 Chünz

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Posted 16 May 2005 - 03:50 PM

Hey there,

I'm struggling with this question a bit... I got 37 units power2.gif but the answers say 40½

Thanks for your help.

#2 Dave

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Posted 16 May 2005 - 03:53 PM

whats the integral

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#3 Chünz

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Posted 16 May 2005 - 03:59 PM

Whoops... sorry blush.gif

Area 1
1
integral.gif [(x+1)(x-1)(x-3)] - [(5x-5)]
-2

Area 2
4
integral.gif [(5x-5)] - [(x+1)(x-1)(x-3)]
1

#4 Dave

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Posted 16 May 2005 - 04:15 PM

i am a little confused

i am looking at the 2004 answers on the sqa website and Question 8 paper 2 is on tangents to lines and circles there is no integration

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#5 Chünz

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Posted 16 May 2005 - 05:32 PM

QUOTE(Dave @ May 16 2005, 04:15 PM)
i am a little confused

i am looking at the 2004 answers on the sqa website and Question 8 paper 2 is on tangents to lines and circles there is no integration

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Sorry... I should really check over things... it's the 2001 paper.

Just shoot me in the head with a massive gun! tongue.gif blush.gif blush.gif

Thank you smile.gif

#6 Dave

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Posted 16 May 2005 - 05:53 PM

for area one you should get x4 / 4 - x3 - 3x2 + 8x

this should give 20.25

area two

you should get

-(x)2/4 + x3 + 3x2 - 8x

this should also give 20.25

which when added gives 40.5 as required

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#7 Chünz

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Posted 16 May 2005 - 07:20 PM

Ah right... I see now!

Thanks for all your help Dave! wink.gif biggrin.gif - is there anything you can't do?

#8 Dave

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Posted 16 May 2005 - 09:14 PM

QUOTE($D$2 @ May 16 2005, 08:20 PM)

Thanks for all your help Dave!  wink.gif  biggrin.gif - is there anything you can't do?

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hehe well...

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