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Evaluate:

sum_(n=2)^(6)(nx+3)
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Evaluate:\newlinen=26(nx+3) \sum_{n=2}^{6}(n x+3) \newlineAnswer:\newlineSubmit Answer

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Q. Evaluate:\newlinen=26(nx+3) \sum_{n=2}^{6}(n x+3) \newlineAnswer:\newlineSubmit Answer
  1. Understand summation notation: Understand the summation notation.\newlineThe expression n=26(nx+3)\sum_{n=2}^{6}(nx+3) means we need to evaluate (nx+3)(nx+3) for each integer value of nn from 22 to 66 and then sum the results.
  2. Evaluate expression for n=2n=2: Evaluate the expression for n=2n=2. Substitute n=2n=2 into the expression (nx+3)(nx+3) to get (2x+3)(2x+3).
  3. Evaluate expression for n=3n=3: Evaluate the expression for n=3n=3. Substitute n=3n=3 into the expression (nx+3)(nx+3) to get (3x+3)(3x+3).
  4. Evaluate expression for n=4n=4: Evaluate the expression for n=4n=4. Substitute n=4n=4 into the expression (nx+3)(nx+3) to get (4x+3)(4x+3).
  5. Evaluate expression for n=5n=5: Evaluate the expression for n=5n=5. Substitute n=5n=5 into the expression (nx+3)(nx+3) to get (5x+3)(5x+3).
  6. Evaluate expression for n=6n=6: Evaluate the expression for n=6n=6. Substitute n=6n=6 into the expression (nx+3)(nx+3) to get (6x+3)(6x+3).
  7. Add evaluated expressions: Add all the evaluated expressions together.\newlineSum the results from steps 22 to 66:\newline(2x+3)+(3x+3)+(4x+3)+(5x+3)+(6x+3)(2x+3) + (3x+3) + (4x+3) + (5x+3) + (6x+3).
  8. Combine like terms: Combine like terms.\newlineAdd all the xx terms together and all the constant terms together:\newline(2x+3x+4x+5x+6x)+(3+3+3+3+3)(2x + 3x + 4x + 5x + 6x) + (3 + 3 + 3 + 3 + 3).
  9. Perform addition: Perform the addition.\newlineCalculate the sum of the x terms: 2x+3x+4x+5x+6x=20x2x + 3x + 4x + 5x + 6x = 20x.\newlineCalculate the sum of the constant terms: 3+3+3+3+3=153 + 3 + 3 + 3 + 3 = 15.
  10. Write final expression: Write the final expression.\newlineCombine the results from step 99 to get the final answer: 20x+1520x + 15.

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