Q. Evaluate ∫11e2+10x−104x−41dx. Write your answer in simplest form with all logs condensed into a single logarithm (if necessary).
Simplify Integrand: Simplify the integrand if possible.The integrand (4x−41)/(x−10) can be simplified by long division since the degree of the numerator is equal to the degree of the denominator. We divide 4x by x to get 4 and multiply (x−10) by 4 to get 4x−40. We subtract this from the numerator to get a remainder of −1. So, the integrand simplifies to 4−1/(x−10).
Split Integral: Split the integral into two simpler integrals.We can write the integral as the sum of two simpler integrals:∫x−104x−41dx=∫4dx−∫x−101dx.
Integrate Terms: Integrate each term separately.The integral of 4 with respect to x is 4x, and the integral of 1/(x−10) with respect to x is ln∣x−10∣. So we have:∫4dx=4x and ∫(x−10)1dx=ln∣x−10∣.
Combine Results: Combine the results and apply the limits of integration.Combining the results from the previous step, we get:∫x−104x−41dx=4x−ln∣x−10∣ from 11 to e2+10.Now we need to evaluate this expression from 11 to e2+10:[4x−ln∣x−10∣] evaluated from 11 to e2+10 = [4(e2+10)−ln∣e2+10−10∣]−[4(11)−ln∣11−10∣].
Perform Evaluation: Perform the evaluation at the upper and lower limits.First, we evaluate at the upper limit e2+10:4(e2+10)−ln∣e2+10−10∣=4e2+40−ln∣e2∣.Since e2 is positive, we can remove the absolute value:4e2+40−ln(e2)=4e2+40−2.Next, we evaluate at the lower limit 11:4(11)−ln∣11−10∣=44−ln∣1∣=44−0 (since ln(1)=0).
Subtract Limits: Subtract the lower limit evaluation from the upper limit evaluation.Now we subtract the lower limit result from the upper limit result:[4e2+40−2]−[44]=4e2+40−2−44=4e2−6.
Write Final Answer: Write the final answer.The final answer is the result of the subtraction from the previous step:4e2−6.
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