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25 24. sum_{i=1}^{25} (i^3 - 2i) Evaluating a Sum In Exercises 25, 26, 27, and 28, use the summation formulas to rewrite the expression without the summation notation. Use the result to find the sums for n = 10, 100, 1000, and 10,000. 25. sum_{i=1}^{n} frac{2i + 1}{n^2} Answer 26. sum_{j=1}^{n} frac{7j + 4}{n^2} 27. sum_{k=1}^{n} frac{6k(k - 1)}{n^3} Answer 28. sum_{i=1}^{n} frac{2i^3 - 3i}{n^4} Approximating the Area of a Plane Region In Exercises 29, 30, 31, 32, 33 and 34 use left and right endpoints and the given number of rectangles to

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24. sum_{i=1}^{25} (i^3 - 2i)
Evaluating a Sum In Exercises 25, 26, 27, and 28, use the summation
formulas to rewrite the expression without the summation notation. Use the
result to find the sums for n = 10, 100, 1000, and 10,000.
25. sum_{i=1}^{n} frac{2i + 1}{n^2}
Answer
26. sum_{j=1}^{n} frac{7j + 4}{n^2}
27. sum_{k=1}^{n} frac{6k(k - 1)}{n^3}
Answer
28. sum_{i=1}^{n} frac{2i^3 - 3i}{n^4}
Approximating the Area of a Plane Region In Exercises 29, 30, 31, 32,
33 and 34 use left and right endpoints and the given number of rectangles to

$25 24. sumi=1^25 (i^3 - 2i) Evaluating a Sum In Exercises 25, 26, 27, and 28, use the summation formulas to rewrite the expression without the summation notation. Use the result to find the sums for n = 10, 100, 1000, and 10,000. 25. sumi=1^n frac2i + 1n^2 Answer 26. sumj=1^n frac7j + 4n^2 27. sumk=1^n frac6k(k - 1)n^3 Answer 28. sumi=1^n frac2i^3 - 3in^4 Approximating the Area of a Plane Region In Exercises 29, 30, 31, 32, 33 and 34 use left and right endpoints and the given number of rectangles to$

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