$1 \cdot 2 \cdot 3 + 2 \cdot 3 \cdot 4 + 3 \cdot 4 \cdot 5 + \dots$ श्रेणी के $n$ पदों का योग क्या होगा?

  • A
    $\frac{1}{4} n (n + 1) (n + 2)$
  • B
    $\frac{1}{4} n (n + 1) (n + 2) (n + 3)$
  • C
    $\frac{1}{2} (n + 1) (n + 2) (n + 3)$
  • D
    इनमें से कोई नहीं

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