Question

Find the first six terms of the sequence.

a1 = -7, an = 4 • an-1

-7, -28, -112, -448, -1792, -7168

-28, -112, -448, -1792, -7168, -28,672

-7, -28, -24, -20, -16, -12

0, 4, -28, -24, -20, -16

Answer 1

\[a_n= 4 a_{n-1} \]
is short for, to find the next a multiply the "current a" by 4
you start with a1= -7
what is the next a (what is a2 ?)
a2 is 4 * a1

what is a2 ?

Answer 2

-14???

Answer 3

they tell you a1 is -7 .... the first number in the sequence is -7

looking at your choices, you can cross off any that don't start with -7

now find a2 to figure out which of what is left is the answer.

Answer 4

is it the first one???