Evaluate the integral ∫(0 to 1) (x^3 + 2x^2)dx.

Practice Questions

Q1
Evaluate the integral ∫(0 to 1) (x^3 + 2x^2)dx.
  1. 1/4
  2. 1/3
  3. 1/2
  4. 1

Questions & Step-by-Step Solutions

Evaluate the integral ∫(0 to 1) (x^3 + 2x^2)dx.
  • Step 1: Identify the integral to evaluate: ∫(0 to 1) (x^3 + 2x^2)dx.
  • Step 2: Break the integral into two parts: ∫(0 to 1) x^3 dx + ∫(0 to 1) 2x^2 dx.
  • Step 3: Find the antiderivative of x^3, which is (x^4)/4.
  • Step 4: Find the antiderivative of 2x^2, which is (2x^3)/3.
  • Step 5: Combine the antiderivatives: (x^4)/4 + (2x^3)/3.
  • Step 6: Evaluate the combined antiderivative from 0 to 1: [(1^4)/4 + (2*1^3)/3] - [(0^4)/4 + (2*0^3)/3].
  • Step 7: Calculate the values: (1/4 + 2/3) - (0 + 0).
  • Step 8: Find a common denominator to add 1/4 and 2/3. The common denominator is 12.
  • Step 9: Convert 1/4 to 3/12 and 2/3 to 8/12.
  • Step 10: Add the fractions: 3/12 + 8/12 = 11/12.
  • Definite Integral Evaluation – The process of calculating the area under a curve defined by a function over a specified interval.
  • Polynomial Integration – Applying the power rule for integration to polynomial functions.
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