In an arithmetic sequence, the nth term an is given by the formula a = a + (n 1)d, where a is the first term and d is the common difference. Similarly, in a geometric sequence, the nth term is given by a = a r-1. Here r is the common ratio. Use these formulas to _n-1 determine the indicated term in the given sequence. The 30th term of 1, 3, 5, 7,... The 30th term of the sequence is (Simplify your answer.)