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The term-to-term rule of a sequence is multiply by 3
The fourth term of the sequence is 54
Work out the first term of the sequence.

Answer :

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Geometric sequence

r = 3

U₄ = 54

Uₙ = arⁿ⁻¹

54 = a.3⁴⁻¹

54 = a.3³

a = first term = 2

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