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D H said:You didn't transform the integration limits, for one thing. I didn't look beyond that to see if you made other mistakes.
Integration by substitution of new variable is a method of solving integrals by replacing the original variable with a new one. This allows for the integral to be simplified and solved more easily.
Integration by substitution of new variable is typically used when the integrand (the expression being integrated) contains a complicated function or a combination of functions that can be simplified by substitution.
To perform integration by substitution of new variable, follow these steps:
Integration by substitution of new variable can simplify and solve complicated integrals that would be difficult or impossible to solve using other methods. It also allows for a more efficient and organized approach to solving integrals.
While integration by substitution of new variable can solve many integrals, it is not a foolproof method and may not work for all integrals. Additionally, it requires a good understanding of derivative rules and substitution techniques in order to be applied effectively.