Write the first four terms in the following sequences. A(n+1)=12 A(n) for n≥1 and A(1)=4 .

Such sequences can be expressed in terms of the nth term of the sequence. In this case, the nth term = 2n. To find the 1st term, put n = 1 into the formula, to find the 4th term, replace the n's by 4's: 4th term = 2 × 4 = 8