Understand summation notation: Understand the summation notation.The expression ∑n=26(nx+3) means we need to evaluate (nx+3) for each integer value of n from 2 to 6 and then sum the results.
Evaluate expression for n=2: Evaluate the expression for n=2. Substitute n=2 into the expression (nx+3) to get (2x+3).
Evaluate expression for n=3: Evaluate the expression for n=3. Substitute n=3 into the expression (nx+3) to get (3x+3).
Evaluate expression for n=4: Evaluate the expression for n=4. Substitute n=4 into the expression (nx+3) to get (4x+3).
Evaluate expression for n=5: Evaluate the expression for n=5. Substitute n=5 into the expression (nx+3) to get (5x+3).
Evaluate expression for n=6: Evaluate the expression for n=6. Substitute n=6 into the expression (nx+3) to get (6x+3).
Add evaluated expressions: Add all the evaluated expressions together.Sum the results from steps 2 to 6:(2x+3)+(3x+3)+(4x+3)+(5x+3)+(6x+3).
Combine like terms: Combine like terms.Add all the x terms together and all the constant terms together:(2x+3x+4x+5x+6x)+(3+3+3+3+3).
Perform addition: Perform the addition.Calculate the sum of the x terms: 2x+3x+4x+5x+6x=20x.Calculate the sum of the constant terms: 3+3+3+3+3=15.
Write final expression: Write the final expression.Combine the results from step 9 to get the final answer: 20x+15.
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