What's the sum of the integers from 1 to 300?

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The formula to find the sum of a finite arithmetic sequence is S =n/2(a+b), wherenis the number of terms,ais the first term in the sequence, andbis the last term in the sequence. In this case there are 300 terms (n), and the first term is 1 and the final term is 300. S =n/2(a+b) S = 300/2(1 + 300) S = 150(301) S = 45,150 x+ 3 x2 + 3x + 3x+ 9 x2 + 6x+ 9

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