Partial Fraction Decomposition: We have the integral to solve: ∫(x−2)(x+5)7dxTo solve this integral, we will use partial fractions" target="_blank" class="backlink">fraction decomposition to break the integrand into simpler fractions that can be integrated easily.
Express Integrands as Fractions: Express the integrand as a sum of partial fractions.We want to find constants A and B such that:(x−2)(x+5)7=(x−2)A+(x+5)BTo find A and B, we multiply both sides by the denominator (x−2)(x+5) to get:7=A(x+5)+B(x−2)
Solve for Constants A and B: Solve for A and B by substituting suitable values for x. Let x=2, then we get: 7=A(2+5)+B(2−2)7=7AA=1 Let x=−5, then we get: B0B1B2
Rewrite Integral with Partial Fractions: Rewrite the integral with the found partial fractions.\int\frac{\(7\)}{(x\(-2\))(x+\(5\))}dx = \int\frac{\(1\)}{x\(-2\)}dx - \int\frac{\(1\)}{x+\(5\)}dx
Integrate Each Term Separately: Integrate each term separately. The integral of \(\frac{1}{(x-2)}dx is ln∣x−2∣, and the integral of (x+5)1dx is ln∣x+5∣. So, ∫(x−2)1dx−∫(x+5)1dx=ln∣x−2∣−ln∣x+5∣+C, where C is the constant of integration.
Combine Results for Final Answer: Combine the results to write the final answer.The indefinite integral of (x−2)(x+5)7 with respect to x is ln∣x−2∣−ln∣x+5∣+C.
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