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Evaluate 
int_(5)^(10)(2x^(2)-13 x+19)/(x-4)dx. Write your answer in simplest form with all logs condensed into a single logarithm (if necessary).

Evaluate 5102x213x+19x4dx \int_{5}^{10} \frac{2 x^{2}-13 x+19}{x-4} d x . Write your answer in simplest form with all logs condensed into a single logarithm (if necessary).

Full solution

Q. Evaluate 5102x213x+19x4dx \int_{5}^{10} \frac{2 x^{2}-13 x+19}{x-4} d x . Write your answer in simplest form with all logs condensed into a single logarithm (if necessary).
  1. Perform Polynomial Long Division: Perform polynomial long division to simplify the integrand.\newlineWe need to divide the polynomial 2x213x+192x^2 - 13x + 19 by x4x - 4.
  2. Polynomial Long Division Calculation: Polynomial long division calculation.\newline2x22x^2 divided by xx gives 2x2x. Multiply (x4)(x - 4) by 2x2x to get 2x28x2x^2 - 8x. Subtract this from 2x213x2x^2 - 13x to get 5x-5x. Bring down the +19+19 to get 5x+19-5x + 19.\newline5x-5x divided by xx gives xx22. Multiply (x4)(x - 4) by xx22 to get xx55. Subtract this from 5x+19-5x + 19 to get xx77.\newlineThe result of the division is xx88 with a remainder of xx77.
  3. Rewrite Integral with Result: Rewrite the integral with the result of the division.\newlineThe integral becomes:\newline(2x5)dx(1x4)dx\int (2x - 5)\,dx - \int (\frac{1}{x - 4})\,dx, evaluated from 55 to 1010.
  4. Integrate Polynomial Part: Integrate the polynomial part.\newlineThe integral of 2x52x - 5 with respect to xx is x25xx^2 - 5x.
  5. Integrate Rational Part: Integrate the rational part. The integral of 1x4\frac{1}{x - 4} with respect to xx is lnx4\ln|x - 4|.
  6. Combine and Evaluate Results: Combine the results and evaluate from 55 to 1010. The integral becomes: (x25x)lnx4(x^2 - 5x) - \ln|x - 4|, evaluated from 55 to 1010.
  7. Evaluate at Upper Limit: Evaluate the antiderivative at the upper limit x=10x = 10. Substitute x=10x = 10 into the antiderivative to get: (102510)ln104=(10050)ln6=50ln(6)(10^2 - 5\cdot 10) - \ln|10 - 4| = (100 - 50) - \ln|6| = 50 - \ln(6).
  8. Evaluate at Lower Limit: Evaluate the antiderivative at the lower limit x=5x = 5. Substitute x=5x = 5 into the antiderivative to get: (525×5)ln54=(2525)ln1=0ln(1)=0(5^2 - 5\times 5) - \ln|5 - 4| = (25 - 25) - \ln|1| = 0 - \ln(1) = 0.
  9. Subtract Lower from Upper: Subtract the value at the lower limit from the value at the upper limit.\newline(50ln(6))(0)=50ln(6)(50 - \ln(6)) - (0) = 50 - \ln(6).
  10. Write Final Answer: Write the final answer in simplest form.\newlineThe final answer is 50ln(6)50 - \ln(6).