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MATH / The terms of an arithmetic sequence add to 715. The first term of the sequence is increased by 1, the second term is increased by 3, the third term is increased by 5, and in genera…

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problem

The terms of an arithmetic sequence add to 715715. The first term of the sequence is increased by 11, the second term is increased by 33, the third term is increased by 55, and in general, the kkth term is increased by the kkth odd positive integer. The terms of the new sequence add to 836836. Find the sum of the first, last, and middle terms of the original sequence.
Plain-text mathematical notation (without MathML)
The terms of an arithmetic sequence add to 715. The first term of the sequence is increased by 1, the second term is increased by 3, the third term is increased by 5, and in general, the kth term is increased by the kth odd positive integer. The terms of the new sequence add to 836. Find the sum of the first, last, and middle terms of the original sequence.
Original LaTeX notation
The terms of an arithmetic sequence add to $715$. The first term of the sequence is increased by $1$, the second term is increased by $3$, the third term is increased by $5$, and in general, the $k$th term is increased by the $k$th odd positive integer. The terms of the new sequence add to $836$. Find the sum of the first, last, and middle terms of the original sequence.

level

Level 3

type

Intermediate Algebra

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