Math, asked by ashaakkysoni, 10 months ago

please ans this and don't spam​

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Answers

Answered by Anonymous
3

Answer:

-346

Step-by-step explanation:

Hope it helps you.....

Sn = n(n+1)/2....

Answered by Anonymous
4

Step-by-step explanation:

—346 is the answer mate hope it will help you a lot.

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