Use the formula S
=n(n + 1)2
to find the sum of 1 + 2 + 3 + ... +
900.
...
![Mathematics](/tpl/images/cats/mat.png)
Mathematics, 28.09.2021 15:10, johnsonwhitney2
Use the formula S
=n(n + 1)2
to find the sum of 1 + 2 + 3 + ... +
900.
![answer](/tpl/images/cats/otvet.png)
Answers: 1
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