A-Level Maths: H5-17 Further Integration: Examples of Integration by Substitution Part 3

[babajani]

Would reversing the chain rule not work in these cases then.

[sughrashabir]

Hi Sir.
Im looking for videos explainin integrals of roots and division.
How wud you go bout integratin 4x over root 2x -1.

[Boppa]

why is part of the last question u-4 instead of u-3

[raashidmunaf]

in the last question i think you got it wrong, 1/4 divided by 1/6 is 3/2

[blazethe]

How comes we can use integration by substitution here? I thought we can only use it if the derivative of a function is on the outside?