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The sum of the first n terms of a certain sequence is n(n+1)(n+2). Find the tenth term of the sequence.

 Apr 20, 2020
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S10 = S+ a10

a10 = S10 - S9

S10 = 10(11)(12) = 1320

 

S9 = 9(10)(11) = 990

a10 = 1320 - 990 = 330

 Apr 21, 2020

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