Which sequence is defined by the following recursive formula a1=-2 an+1 =2an+4

Question

a

-2, 2, 6, 10, ...

b

-2, -8, -12, -20, ...

c

-2, 0, 4, 12, ...

d

-2, 8, 20, 44, ...

Answer 1

C

-2, 0, 4, 12

-2, -2(2)+4, 2(0)+4, 2(4)+4 = 2,-4+4, 0+4, 8+4= 2,0,4, 12

multiply previous term by -2 then add 4