This math topic focuses on calculating the sum of integers within a specified range using a formula. The problems require determining the sum of consecutive integers from a given lower bound \( M \) to an upper bound \( N \), using an equation in LaTeX format. The equations incorporate the method of summing the first \( N \) integers and subtracting the sum of the first \( M-1 \) integers, leveraging the properties of arithmetic sequences. Students practice these skills through multiple-choice questions, each offering different numeric options as potential answers.

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Sums - Series of Integers M to N - Equation to Sum


What is the sum of the integers from 9 to 15 based on this equation?

15(15+1)2(91)92\frac{15(15+1)}{2} - \frac{(9-1)9}{2}

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