Math, asked by madhv9837, 1 year ago

Sum of new number of term is n^2+3n. Then find 20th term

Answers

Answered by Saatwiik

1

Answer: 44

Step-by-step explanation:

S₂₁ = (21)²+3(21) = 441 + 63 = 504

S₂₀ = (20)² + 3(20) = 400 + 60 = 460

A₂₁ = S₂₁ - S₂₀ = 504 - 460 = 44

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