Differentiation to find coordinates and nature of stationary points

[errant shuttle]

We know the x coordinates from the info above and that the first one is maximum and the 2nd is minimum, but how do we find the y coordinates as there is no equation to substitute in the x values

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[true mulch]

its written in the question that f(0)=3 ans f(3)=0

[errant shuttle]

so is it literally (0,3) maximum (3,0) minimum

@true mulch

[true mulch]

yes

[errant shuttle]

thanks

+close