The intersection point of x = 1 and is (1, 7). So using the washer method:This is a little different from the other four I have done. The problem states:
Y=7x^2, x=1, y=0
about the x-axis
Some of the other problems have y=x^2 and y=3x and they tell you it is rotated around the line x=3. I know with this one we put x^2=3x then solve for x and get o,3 then put them back in to get the y's so we have (0,0) and (3,9) and now we know our limit is from 0 to 9 and then on our picture on the graph we know this volume is rotated around the line x=3. So we then integrate and then take the limit to get the area. I guess that this probelm looks a bit different but I still need to follow the same procedure. I tried to solve for x and had x= sqrt(y/7), x=1. I looked in the book for the odd number questions, so I could see if there were any like this worked out so I could get an idea what to do but as it usually goes, there are no examples like this. The next three are like this one, so any help would be appreciated.