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**Zysyewgg** · 06-02-2007, 01:07 AM

Use the substitution u=4x-1

so du=4dx

if x=1, u=3
if x=2, u=7

stick them in and integrate the now much simpler expression, and you get 2/21

I think!

Hope that helps,

Gareth

06-02-2007, 01:07 AM	#4
Zysyewgg Join Date Oct 2005 Posts 537 Senior Member	Use the substitution u=4x-1 so du=4dx if x=1, u=3 if x=2, u=7 stick them in and integrate the now much simpler expression, and you get 2/21 I think! Hope that helps, Gareth
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