## College Algebra 7th Edition

If 1 symbol is used, there are 2 ways to create a sequence. If 2 symbols are used, there are $2 \times 2 = 4$ ways. If 3 symbols are used, there are $2\times2\times2 = 8$ ways. In total, there are $2 + 4 + 8 = 14$ ways.