If 1 + 2 + 3 + ..... + n = 45, then 1 3 + 2 3 + 3 3 +....+ n 3 is

Mathematics · JEE Main · NTA Exams — Progression and Series

1. (45)²
2. (45)³
   
3. (45)² + 45
4. none of these

Answer

(A) (45) 2

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