Evaluate ∫(2x^2 + 3x + 1)dx. (2021)

Practice Questions

Q1
Evaluate ∫(2x^2 + 3x + 1)dx. (2021)
  1. (2/3)x^3 + (3/2)x^2 + x + C
  2. (2/3)x^3 + (3/2)x + C
  3. (2/3)x^3 + (3/2)x^2 + C
  4. (2/3)x^3 + 3x + C

Questions & Step-by-Step Solutions

Evaluate ∫(2x^2 + 3x + 1)dx. (2021)
  • Step 1: Identify the function to integrate, which is (2x^2 + 3x + 1).
  • Step 2: Break down the integral into separate parts: ∫(2x^2)dx + ∫(3x)dx + ∫(1)dx.
  • Step 3: Integrate the first part: ∫(2x^2)dx. The formula for integrating x^n is (1/(n+1))x^(n+1). Here, n=2, so it becomes (2/3)x^3.
  • Step 4: Integrate the second part: ∫(3x)dx. Using the same formula, n=1, so it becomes (3/2)x^2.
  • Step 5: Integrate the last part: ∫(1)dx. The integral of 1 is simply x.
  • Step 6: Combine all the results from the integrations: (2/3)x^3 + (3/2)x^2 + x.
  • Step 7: Add the constant of integration, C, to the final result.
  • Integration – The process of finding the integral of a function, which involves calculating the antiderivative.
  • Polynomial Functions – Understanding how to integrate polynomial expressions term by term.
  • Constant of Integration – Recognizing the importance of adding the constant of integration (C) after finding the indefinite integral.
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