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OpenStudy (anonymous):
If f(x)=x^4-14x^3+72x^2+6x-10, find the largest interval on which f(x) is concave downward. If we write the interval as (a,b). How do I start solving this problem?
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OpenStudy (paounn):
What instrument do you use to determine where the concavity of a graph is oriented?
OpenStudy (anonymous):
the second derivative?
OpenStudy (paounn):
Exactly. How?
OpenStudy (anonymous):
How?....So it would be f"(x)=12x^2-84x+144 right?
OpenStudy (anonymous):
I got the answer thanks!
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