Let http://math.webwork.rochester.edu:80...765f9f5d31.png.

Find http://math.webwork.rochester.edu:80...360f702271.png

and http://math.webwork.rochester.edu:80...05a0da7011.png Let http://math.webwork.rochester.edu:80...765f9f5d31.png.

Find http://math.webwork.rochester.edu:80...360f702271.png

and http://math.webwork.rochester.edu:80...05a0da7011.png

So I found the first one, which is just 0.

How do I find the seecond one? I don't get the logic of it...