Video transcriptSo what we're goingto attempt to do is evaluate thissum right over here, evaluate what thisseries is, negative 2 over n plus 1 times n plus2, starting at n equals 2, all the way to infinity. And if we wanted to see whatthis looks like, it starts at n equals 2. So when n equals 2, thisis negative 2 over 2 plus 1, which is 3, times2 plus 2, which is 4. Then when n is equal to 3,this is negative 2 over 3 plus 1, which is 4, times3 plus 2, which is 5. And it just keeps goinglike that, negative 2 over 5 times 6. Читать дальше...