Find the geometric means in the following sequence.
-,216
select one:
a. -144, -576, -2,304, -9,231
b. 36, 144, 576, 2,304
c. -720, -1,080, -1,440, -1,800
d. -36, -144, -576, -2,304

Last choice. d.

Step-by-step explanation:

We are given the first term and the sixth term.

The first term is .

The sixth them is .

Let's solve for the common ratio, r.

Divide both sides by -9:

Take the fifth root of both sides:

So the common ratio is 4.

t = 3

step-by-step explanation:

put t = 3 in this expression :

(3²-1)(3²-2)(3² - 3)(3² - 4) = 8×7×6×5 = 56×30 = 1680

the forst and 3rd

step-by-step explanation: