Question

(iv) 1.2.3 + 2.3.4 + 3.4.5 + ..........+ n terms is
a) n(n-1)(n+1) b) n 2n 3n c) 2n 3n 4n d) n(n+1)(n+2)​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

d) n(n+1)(n+2) is answer