Option B is the answer. The term for the geometric sequence that we have here is -3.
How to solve for the geometric sequence
We have u1, u2, u3 = a, ar, ar², ar³
From here we have to find the common ratio that is used to divide the sets of numbers
6,561 divided by −2,187 = -3
Hence when we go further each of the value when divided by -3 gives the next value.
Hence the value for the geometric sequence is -3.
Read more on geometric sequence here:
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