5.5 Integration & Anti-derivatives
Method of Substitution
Question #4 (Medium): Evaluating the Definite Integral
Usually substitutable functions are hidden inside distinctive group of functions, such as trigonometric,
exponential powers, square roots, rational functions in the denominator, etc.
When using the method of substitution, make sure to not only apply the most appropriate substitution,
but also to change the original interval to the new interval that match the substitution. So that,
∫ ( ( )) ( ) ∫ ( ) ( ) [ ( )] ( ) ( ( ) ) ( ( ) ).
( ) ( )
When the change of the interval is made from the start, substituting back in the original variais not
necessary. This is the preferred and easier approach to sol