Worked solution
Integrate partial fractions with logarithm and arctangent terms
Using partial fractions, find . Give your answer as , with rational .
[2014/II/2]
CJC · Discussion · Question 2
Answer
.
Find the partial-fraction coefficients
Write the fraction as . Then . At , ; at , , so ; at , , so . Thus the integrand is .
How did this part go?
Integrate and evaluate the endpoints
An antiderivative is . Evaluation from to gives . Hence , , , .
How did this part go?
Common mistakes
Use ln|2x − 5| because 2x − 5 is negative throughout the integration interval.