calculus · worked example

Solve ∫ x² dx

Method: 積分的冪次法則. Verified step-by-step solution with our free AI math solver.
Problem

x2dx\int x^2 \, dx

Step-by-step solution

  1. 套用積分的冪次法則xndx=xn+1n+1+C\int x^n \, dx = \frac{x^{n+1}}{n+1} + C(在 n1n \neq -1 時成立)。

  2. n=2n = 2 時:x2dx=x2+12+1+C=x33+C\int x^2 \, dx = \frac{x^{2+1}}{2+1} + C = \frac{x^3}{3} + C

  3. 務必加上積分常數 CC——不定積分代表一族原函數。

Answer

x33+C\frac{x^3}{3} + C

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