solving steps

an = 2 + (n + 1 )

multiply each term in the parentheses by 2

an = 2n x 2

7. an = 2n x 2

solving steps

a = 2 + ( n + 2)

n

When the is a + in front of an expression in parentheses, the expression remains the same.

a = 2 + n + 2

add the numbers

a = 4 + n

n

8. a = 4 + n

n