Question

Find the first six terms of the sequence. a1 = 4, an = 2 • an-1 A. 4, 8, 10, 12, 14, 16 B. 0, 2, 8, 10, 12, 14 C. 4, 8, 16, 32, 64, 128 D. 8, 16, 32, 64, 128, 256

Answer 1

c

Explanation:

Answer 2

The sequence is the following:


`a_1=4`

`a_n=2*a_n_-_1`

the second description means that each term, is 2 times its previous term

so

`a_1=4`


`a_2=2*a_1=2*4=8`


`a_3=2*a_2=2*8=16`


`a_4=2*a_3=2*16=32`


`a_5=2*a_4=2*32=64`


`a_6=2*a_5=2*64=128`


Answer: C) 4, 8, 16, 32, 64, 128