Question

Find an equation for the nth term of sequence.
-4, -16, -64, -25,...

Answer 1

is that last number -25 correct?

Answer 2

sorry its suppose to be -256

Answer 3

looks like a geometric sequence
what do you get for -16/-4 and -64/-16

Answer 4

?

Answer 5

can you do these 2 divisions?

Answer 6

yes

Answer 7

4

Answer 8

right

yes it is a GS with common ratio 4

nth term = a1 r^(n-1) where a1 = first term and r = common ratio

so plug in your given values of a1 and the value we just found for r and you have the answer.

Answer 9

ok i got thanks

Answer 10

yw