Mathematics

Problem

For each of the following sequences: - Write down an expression for

S_n

. - Find

S_5

. a. 3, 11, 19, 27, .... b. 42, 37, 32, 27, .... c. 12, 6, 3,

1\frac{1}{2}

, .... d. 2, 3,

4\frac{1}{2}

6\frac{3}{4}

, .... e. 1,

\frac{1}{2}

\frac{1}{4}

\frac{1}{8}

, .... f. 1, 8, 27, 64, ....