Question

what are the explicit equation and domain for a geometric sequence with a first time of 4 and a second term of -12?

Answer 1

@ganeshie8

Answer 2

@misty1212

Answer 3

helpppppp

Answer 4

4, -12,

Answer 5

what's do I plug in for r??

Answer 6

-12/4 = -3

a_n = 4 * (-3) ^ (n - 1)

Start with n = 1 and see if the formula yields 4.

Then, let n = 2 and see if the formula yields -12

Answer 7

I'm so confused

Answer 8

@directrix

Answer 9

Maybe you should throw up those options for this problem so that we could decide which one it is.

Answer 10

an=4(-3)^n-1; all integers where n >_ 1

an=4(-3)^n-1; all interferes where n >_ 0

an=4(36)^n-1; all integers where n >_ 1

an=4(36)^n-1; all integers where n >_ 0

Answer 11

We already know that the answer has to be A or B from the nth term formula.

Answer 12

If you put 0 in for n, you do not get the first term. So, that leaves which option as the answer?

Answer 13

a??

Answer 14

Correct.