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    • Question

      The nth term of a sequence is n² + 3n + 1. Find the

      difference between the 20th and 10th terms.
      A 330 Correct Answer Incorrect Answer
      B 225 Correct Answer Incorrect Answer
      C 300 Correct Answer Incorrect Answer
      D 365 Correct Answer Incorrect Answer

      Solution

      ATQ, T₂₀ – T₁₀ = (400+60+1) – (100+30+1) = 461 – 131 = 330 .

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