Math Problem Statement

Consider the function f(x) = 10/x^3 - 10/x^6. Let F(x) be the antiderivative of f(x) with F(1) = 0. Then F(x) = ___

Solution

To find F(x)F(x), the antiderivative of f(x)=10x310x6f(x) = \frac{10}{x^3} - \frac{10}{x^6} with F(1)=0F(1) = 0, we will integrate f(x)f(x) term by term.

Step 1: Rewrite f(x)f(x) in a more convenient form

Rewrite each term with negative exponents: f(x)=10x310x6f(x) = 10x^{-3} - 10x^{-6}

Step 2: Integrate each term

We find the antiderivative F(x)F(x) by integrating each part separately.

  1. The integral of 10x310x^{-3} is: 10x3dx=10x22=5x2=5x2\int 10x^{-3} \, dx = 10 \cdot \frac{x^{-2}}{-2} = -5x^{-2} = -\frac{5}{x^2}

  2. The integral of 10x6-10x^{-6} is: 10x6dx=10x55=2x5=2x5\int -10x^{-6} \, dx = -10 \cdot \frac{x^{-5}}{-5} = 2x^{-5} = \frac{2}{x^5}

Thus, F(x)=5x2+2x5+CF(x) = -\frac{5}{x^2} + \frac{2}{x^5} + C

Step 3: Solve for CC using F(1)=0F(1) = 0

Substitute x=1x = 1 and F(1)=0F(1) = 0: F(1)=512+215+C=5+2+C=0F(1) = -\frac{5}{1^2} + \frac{2}{1^5} + C = -5 + 2 + C = 0 C=3C = 3

Final Answer

The function F(x)F(x) is: F(x)=5x2+2x5+3F(x) = -\frac{5}{x^2} + \frac{2}{x^5} + 3

Would you like more details on any step, or do you have further questions?


Here are five related questions that could further expand your understanding:

  1. How would you verify that F(x)F(x) is indeed the antiderivative of f(x)f(x)?
  2. What would change if the initial condition was F(1)=1F(1) = 1 instead of F(1)=0F(1) = 0?
  3. How does the integration process change if f(x)f(x) has additional terms with different exponents?
  4. What is the significance of the constant CC in indefinite integrals?
  5. How does the antiderivative behave as xx \to \infty?

Tip: When dealing with powers of xx in integration, rewrite terms with negative exponents to simplify the integration process.

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Math Problem Analysis

Mathematical Concepts

Calculus
Antiderivatives
Integration

Formulas

∫ x^n dx = (x^(n+1))/(n+1) + C, for n ≠ -1

Theorems

Fundamental Theorem of Calculus

Suitable Grade Level

Grades 11-12