Consider the function ?(?)=(?^(4/5))*(?−3). This function has two critical numbers ?<? 1) Then ?= ? and ?...

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Consider the function ?(?)=(?^(4/5))*(?−3). This function hastwo critical numbers ?
1) Then ?= ? and ? = ?.

2) For each of the following intervals, tell whether ?(?) isincreasing or decreasing.
(−∞,?]:   ?
[?,?]: ?
[?,∞): ?

3) The critical number A is ? and the critical number B is ? (arelative maximum / a relative minimum / neither max nor min )
There are two numbers ?

4) Then C = ? and D = ?

5)Finally for each of the following intervals, tell whether ?(?)is concave up or concave down.
(−∞,?): ?
(?,?): ?
(?,∞): ?

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