Find the sum. 5 + 6 + 7 + ... + 11

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asked Jul 27, 2020 6.4k views

1 Answer

Khustochka · Answer 1 · 2020-08-02T02:23:16+0000

5+6+7+8+9+10+11=56
and that's the answer
There's also a formula (5+11)/2*7=56 (you take the average of the first and last terms and multiply that by the number of terms)

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Find the sum. 5 + 6 + 7 + ... + 11