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Suppose on a certain day the low temperature was 32° at midnight, the high temperature was 65° at noon, and then the temperature dropped to 32° the following midnight. Prove there were two times during that day, which were 12 hours apart, when the temperatures were equal (Hint: Let T(t) equal the temperature t hours after midnight and examine the function

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Chapter 2 Solutions
Calculus Early Transcendentals 3rd.edition I.r.c.
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