Critical Numbers

helpm3pl3ase

Find Critical Numbers of:

F(z) = (z+1)/(z^2+z+1)

Did I start off correctly??

D/dz = - (z + 1)(2z+1)/(z^2+z+1)

I think I derived it correctly??? Where do I go from this step?? Thanks

mathman

D/dz = - (z + 1)(2z+1)/(z^2+z+1)

The derivative is wrong.

It should be

((z^2+z+1)-(z+1)(2z+1))/(z^2+z+1)^2

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helpm3pl3ase	Critical Numbers Tweet Find Critical Numbers of: F(z) = (z+1)/(z^2+z+1) Did I start off correctly?? D/dz = - (z + 1)(2z+1)/(z^2+z+1) I think I derived it correctly??? Where do I go from this step?? Thanks