MTH 261 Chain Rule Equation of tangent Line (pg. 59)

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That part is talking about how t cannot be bigger than 13 and cannot be smaller than -13, because if it’s bigger than 13 or smaller than -13, its square will be bigger than 169, causing the radicand to become a negative number. That’s not a real number! So in short, that part doesn’t really have anything to do with the work we do in this problem but just stating the domain. I took that part out on your exam 1 so you can just get straight into finding the derivative.

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What about the -13<t<13 at the top of the question what’s that for?

kashkid