so it goes from 10(x+5) to 10(x+4) at the step of integrating
i might be missing a step of how to integrate these problems properly, though im just confused how the denominator changes.
so it goes from 10(x+5) to 10(x+4) at the step of integrating
i might be missing a step of how to integrate these problems properly, though im just confused how the denominator changes.
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That's a typo. It should continue to be $x+5$ throughout the problem.