Daniels Warner
11/07/2024 · High School

is being pulled away from the wall at 2 feet per second, how fast is the top of the ladder sliding down the wall? 7) Find all open intervals on which the function \( f(x)=x^{4}-2 x^{2}+3 \) is increasing and decreasing. Then find all open intervals on which this function is concave up and concave down. 8) A divided field is to be constructed with 6000 feet of fence as shown.

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7) The function \( f(x)=x^{4}-2x^{2}+3 \) is increasing on \( (-\infty, -1) \) and \( (1, \infty) \), decreasing on \( (-1, 0) \) and \( (0, 1) \), concave up on \( (-\infty, -\frac{1}{\sqrt{3}}) \) and \( (\frac{1}{\sqrt{3}}, \infty) \), and concave down on \( (-\frac{1}{\sqrt{3}}, \frac{1}{\sqrt{3}}) \). 8) The relationship between the length \( x \) and width \( y \) of the field is \( y = \frac{6000 - x}{2} \).

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