PROGRESSION

S = 1.3.4 + 4.5.5 + 7.7.6 + 10.9.7 + ..............

Find sum to n terms ??? (In terms of n)

I have a method but want some time saving one

So post ur methods

1 Answers

The general term is ..

(3n-2)(2n+1)(n+3)

Now we have to apply that general method..splitting the terms n³ ,n² .... and then do the summation..

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