What is the explicit rule (formula) for the nth term of the sequence 4, 7, 10, 13, …?
A4n + 3
B3n + 1
C3n + 4
Dn + 3
Answer & Solution
Correct answer: B. 3n + 1
First term 4, common difference 3 — arithmetic. tₙ = a + (n−1)d = 4 + (n−1)(3) = 3n + 1. Check: t₁ = 4 ✓, t₂ = 7 ✓, t₃ = 10 ✓.
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