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How do you determine the interval(s) on which the function $y = \frac{ln (x)}{x^{3}}$ $y= ln(x) / x^3$ is concave up and concave down?

1 Answer

Apr 15, 2015

Have a look:
enter image source here
Graphically:
graph{(ln(x))/x^3 [-5.55, 5.547, -2.774, 2.77]}

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