Question

26.
1.2.3+2.3.4 + .......... + n(n+1)(n + 2) =
n (n +1)(n + 2) n (n +1)(n + 2)(n +
2)
1)
4
4
n(n +1) (n + 2) (n + 3)
n (n +1) (n + 2) (n
3)
4)
3
6
7. 2.3.1 +3.4.4 +4.5.7 + ......... n terms =
n (9n + 46n² + 51n–34 )
1)
12
(831 162​

Answer 1

Answer:

Step-by-step explanation:

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