Answer: x=18
Step-by-step explanation: ...
Answer:
That is correct
Step-by-step explanation:
When doing the math you can find that b and d are correct
Differentiate it
get f ' (x)=3x^2-4
put 3x^2-4=0
x=2/√3,-2/√3
so interval
x∈(-2/√3,2/√3)
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