Can anyone show me how to do this? I got the question wrong, and it is showing me the solution here. I don't know how to get this answer.
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C`(x) = (1/5) - 440/x^2 C`(25)*(31-25) C`(45)*(51-45) C'(45) -- What's the slope at the starting point. (51-45) -- How many horizontal units?
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