Answers>Maths>IB>Article

How do you integrate xln(x) between the limits of 0 and 2?

In order to answer this question you need to use integration by parts.Using the standard integration by parts formula: ∫u dv/dx dx = uv-∫v du/dx dx.Let:u=ln(x) v=(1/2)x2du/dx=1/x dv/dx=xTherefore we get:I=[1/2xln(x)-1/2∫xdx]20We now know how to integrate x. It becomes 1/2x2. Therefore the overall integral becomes:I=[1/2xln(x)]20-[1/4x2]20I=2ln(2)-1I=ln(4/e)I ≈ 0.386

LK

Related Maths IB answers

All answers ▸

log8(5) = b. Express log4(10) in terms of b


Solve the equation (2 cos x) = (sin 2 x) , for 0 ≤ x ≤ 3π .


The sixth term of an arithmetic sequence is 8 and the sum of the first 15 terms is 60. Find the common difference and list the first three terms.


The fifth term of an arithmetic sequence is equal to 6 and the sum of the first 12 terms is 45. Find the first term and the common difference.