Khan Academy Static

u-substitution is an extremely useful technique. Harnessing the power of the chain rule, it allows us to define a new variable (common denoted by the letter u) as a function of x, and obtain a new expression which is (hopefully) easier to integrate.

6485_u_substitution.html

6489__2_ln_x_x_antiderivative_example.html

6491_u_substitution_with_exponential_function.html

6487_u_substitution_example_3.html

6492_Doing_u_substitution_twice.html

6488_u_substitution_with_ln_x_.html

6490_u_substitution_and_back_substitution.html

6486_u_substitution_example_2.html