Math, asked by MdZidan1437, 1 year ago

find Sn if an= n2 + 2n

Answers

Answered by kunjsarna1

2

Answer:

Buttin 1 at place of n we get,

S1 = 1×2 + 2×1

S1 = 2 + 2

S1 = 4

Answered by zidan43

0

Answer:

hiiii...........................

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