1. ## Determinant calculation

How can i calculate this next determinant?

2 2 ... 2 2 1
2 2 ... 2 2 2
2 2 ... 3 2 2
... ... ... ...
2 n-1 ... 2 2 2
n 2 ... 2 2 2

Thanks for any help...

2. Subtract the first row from each of the other rows. What do you get? Then expand on the second row and use the fact that subtracting a row from another does not change the determinant.