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I am currently using Khan Academy to refresh my knowledge of Calculus. I am very impressed with the content. The site provides a structured learning plan with well thought out lectures and practice...

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I am confused about continuity at a point versus continuity of endpoints that define a closed interval. While taking the Unit Test for Limits and Continuity, I was given two questions, one of which...

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I was given the following problem when performing the "Limits at infinity of quotients with square roots" practice. I am confused by the statement "In the denominator, let's divide by -(x^10)^1/2,...