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3 years ago

Find an explicit rule for the nth term of a geometric sequence where the second and fifth terms are -6 and 162, respectively.

2 answers:

4 0

5th term / 2nd term = r^4 / r = r^3

r^3 = 162/-6 = -27

so r = -3

a1 * r-3 = -6 so first term = 2

an = 2. (-3)^(n-1) Answer

Its B

lana [24]3 years ago

3 0

The answer is B, I have just confirmed it.

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