1) The given pattern continues. Write down the nth term of the sequence {a_n} suggested by the pattern.

1/18, 2/19,3/20,4/21

{a_n}

2)Write down the first five terms of the sequence.

{n/n+7}

assume n>1

3)Express the sum using summation notation.

1/4+2/5+3/6+......10/10+3

4)The Drury Lane Theater has 11 seats in the first row and 33 rows in all. Each successive row contains one additional seat. How many seats are in thetheater?

there are _____ seats in the theater