{1,2,3,4,5...30}
integers from 1 to 3
Answer:
To get the answer above, you could add up all the digits like 1+2+3... +30, but there is a much easier way to do it! Use the following formula:
n(n + 1)/2 = Sum of Integers
In this case, n=30, thus you get your answer by entering 30 in the formula like this:
30(30 + 1)/2 = 465
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Answers & Comments
{1,2,3,4,5...30}
integers from 1 to 3
Answer:
To get the answer above, you could add up all the digits like 1+2+3... +30, but there is a much easier way to do it! Use the following formula:
n(n + 1)/2 = Sum of Integers
In this case, n=30, thus you get your answer by entering 30 in the formula like this:
30(30 + 1)/2 = 465