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mickellowery
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Homework Statement
∫〖e^√x/√x dx〗
would this be a u substitution or a substitution by parts?
U substitution is a technique used in integration to simplify the integrand and make it easier to solve. It involves replacing a complicated expression in the integrand with a simpler variable, U, and then integrating with respect to U.
U substitution is typically used when the integrand contains a single function that is composed of a polynomial, exponential, or trigonometric function. Substitution by parts is used when the integrand contains two functions that can be represented as a product. In general, it is up to the individual's preference and understanding of the techniques.
The key to choosing the appropriate U is to identify a function in the integrand that is a composite of other functions and choose that as U. It should be a function that when differentiated, the resulting expression appears elsewhere in the integrand. This will allow for the simplification of the integrand.
Yes, U substitution can be used for definite integrals. However, it is important to note that the limits of integration also need to be changed in terms of U. This can be done by substituting the original limits into the equation for U and evaluating the limits with respect to U.
One potential drawback of U substitution is that it may not always work for every type of integrand. In some cases, it may be more time-consuming or complicated to use U substitution compared to other integration techniques. Additionally, it may be challenging to identify the appropriate U for more complex integrands.