Hi,

Me and my friend tried to solve:

integral from 1 to 9 of -2/(x-9)^(1/3) dx

So we set it as a lim t --> 9- and got -12 but the homework system says it's wrong. I checked wolfram and it gives the answer as 12(-1)^(2/3) so it's a bit confusing. Not to mention that the graph's area is positive from 1 to 9. Any clarification is appreciated