Can you help me step by step?
Critical points of a function f are the points in the domain of f where the derivative is either zero or is not defined.
To find the critical points of a given function, we differentiate the function and set the derivative equal to zero, this (usually) gives us x-values where the derivative is zero and in addition to this we also look for x-vales at which derivative may not be defined.
All these x-values found form the set of critical points for the given function.
We start by differentiation the given function as shown:
Next we set the derivative found equal to zero as shown:
Observe that 2x-6 being a linear function is defined for all values of x.
Thus, since we have found only one x-value ...
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