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I'm lazy and dont feel like doing math myself. So pls help me!
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I'm lazy and dont feel like doing math myself. So pls help me!

I'm lazy and dont feel like doing math myself. So pls help me!-example-1
User Anshuman Bardhan
by
6.9k points

1 Answer

3 votes

Answer:

55

Explanation:


(n(n + 1))/(2) \\ n = 10 \\ substitutig \\ (10(10 + 1))/(2) \\ \\ (10(11))/(2) \\ \\ (110)/(2) = 55

User Fred Medlin
by
6.4k points
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