Practice problem
What is the recursive formula of the sequence 1,2,4,8,16,…1, 2, 4, 8, 16, \dots1,2,4,8,16,…?
an=2an−1a_n = 2a_{n-1}an=2an−1
an=2ana_n = 2a_{n}an=2an
an=2a(n−1)a_n = 2a(n-1)an=2a(n−1)
an=2an−1a_n = 2a^{n-1}an=2an−1
Type a concept, like “slope” or “photosynthesis”.
