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Mathematics 42 Online
OpenStudy (anonymous):

What are the critical points for y' = 8x/ (x^2+4)^2

OpenStudy (anonymous):

x = 0 -> f (0) = .. (plug into original equation to find y value of critical point)

OpenStudy (anonymous):

I know that too but I only got x=0 as the critical number so juz wondering if there are others other than 0

OpenStudy (anonymous):

Where's your f(x)?

OpenStudy (anonymous):

y = x^2 / (x^2 + 4) for this one, i also only got 0..

OpenStudy (anonymous):

so then the whole function will have no local min or max, or cusp or vertical tangent?

OpenStudy (anonymous):

Since you plug f(0) = 0 ==> critical point (0,0)

OpenStudy (anonymous):

Yep, a lot of rational graph just increasing, decreasing!

OpenStudy (anonymous):

there's nothing wrong with it!

OpenStudy (anonymous):

ohh ok thanks! oh so my part 3 asks to find 2second derivative and cocavity so basically i can skip that since there is no concave points?

OpenStudy (anonymous):

You just lucky at this one! however try to practice all types so you can be ready for your tests!

OpenStudy (anonymous):

thanks yea i have alot others to do haha

OpenStudy (anonymous):

post and make sure type it clearly, make it easy for us to solve it precisely :)

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