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Nat2105 [25]
2 years ago
15

What is the 12th term in the geometric sequence -9,27,-81...?

Mathematics
1 answer:
AnnyKZ [126]2 years ago
4 0

Answer:

  • B) 1594323

Step-by-step explanation:

<h3>Given GP</h3>
  • -9, 27, -81, ...
<h3>To find</h3>
  • 12th term
<h3>Solution</h3>

<u>nth term formula</u>

  • aₙ = a₁rⁿ⁻¹, where r- common ratio, n- number of the term

<u>We have</u>

  • a₁ = -9
  • r = 27/-9 = -81/27 = -3

<u>Find a₁₂</u>

  • a₁₂ = (-9)*(-3)¹¹ = 1594323

Correct choice is B

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