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Evaluate:

sum_(n=2)^(5)(-5x+2n)
Answer:

Evaluate:\newlinen=25(5x+2n) \sum_{n=2}^{5}(-5 x+2 n) \newlineAnswer:

Full solution

Q. Evaluate:\newlinen=25(5x+2n) \sum_{n=2}^{5}(-5 x+2 n) \newlineAnswer:
  1. Evaluate Expression for n=2n=2: We need to evaluate the sum of the series from n=2n=2 to n=5n=5 for the expression (5x+2n)(-5x+2n). We will do this by calculating the value of the expression for each value of nn and then summing those values.
  2. Evaluate Expression for n=3n=3: First, let's find the value of the expression when n=2n=2: (5x+2×2)=(5x+4)(-5x + 2\times2) = (-5x + 4).
  3. Evaluate Expression for n=4n=4: Next, find the value of the expression when n=3n=3: (5x+2×3)=(5x+6)(-5x + 2\times3) = (-5x + 6).
  4. Evaluate Expression for n=5n=5: Now, find the value of the expression when n=4n=4: (5x+2×4)=(5x+8)(-5x + 2\times4) = (-5x + 8).
  5. Sum Values of Expression: Finally, find the value of the expression when n=5n=5: (5x+2×5)=(5x+10)(-5x + 2\times 5) = (-5x + 10).
  6. Combine Like Terms: Now we sum the values of the expression for each nn: (5x+4)+(5x+6)+(5x+8)+(5x+10)(-5x + 4) + (-5x + 6) + (-5x + 8) + (-5x + 10).
  7. Final Result: Combine like terms: 5x5x5x5x+4+6+8+10=20x+28-5x - 5x - 5x - 5x + 4 + 6 + 8 + 10 = -20x + 28.
  8. Final Result: Combine like terms: 5x5x5x5x+4+6+8+10=20x+28-5x - 5x - 5x - 5x + 4 + 6 + 8 + 10 = -20x + 28.The sum of the series from n=2n=2 to n=5n=5 of the expression (5x+2n)(-5x+2n) is 20x+28-20x + 28.

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