SUM to 10 terms of the series 1.2.3+2.3.4+3.4.5+.....

(plz explain the steps also)

the question is very simple

I give u the solution of the general term being n

the question reduces ro

summation n(n+1)(n+2)

expand ..

it will have summation ncube and others which can be solved by simple 12th clas formulas.

use summation.

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