Question

3, -9, 27, --81
Find the 14th term of the sequence.

Answer 1

a₁₄ = - 3¹⁴ = - 4 782 969

Explanation:

-9÷3 = -3

27÷(-9) = -3

-81÷27 = -3

So: r = -3

aₙ = a₁ rⁿ⁻¹

a₁₄ = a₁ r¹³

a₁₄ = 3(-3)¹³ = - 3¹⁴ = - 4 782 969