Fill in each blank so that the resulting statement is true.

Consider the statement 2 + 4 + 6 + g + 2n = n(n + 1).
If n = 1, the statement is 2 = 1(1 + 1).
If n = 2, the statement is 2 + 4 = 2(2 + 1).
If n = 3, the statement is________ .
If n = k + 1, the statement is_________ .