Question: Consider the function f(x)=5x+7x1. For this function there are four important intervals: (,A], [A,B),(B,C], and [C,) where A, and C are the critical numbers and

Consider the function f(x)=5x+7x1. For this function there are four important intervals: (,A], [A,B),(B,C], and [C,) where A, and C are the critical numbers and the function is not defined at B.

Find A

and B

and C

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