Question

3 parts following these instructions Find the critical numbers for f and the open intervals on...

3 parts

following these instructions

Find the critical numbers for f and the open intervals on which f is increasing (decreasing)

For the first question, your answer should be a comma-separated list of x values or the word "none". For the other two, your answer should either be a single interval, such as (0,1), a comma-separated list of intervals, such as (-inf, 2), (3,4), or the word "none".

answeres needed for each

1.   The critical numbers for f are
2.   f is increasing on the intervals
3.   f is decreasing on the intervals

part 1)

f(x)=8x+(6/x)

part 2)

f(x)= 6-(3/x)+(12/x^2)

part 3)

xe^(-4x)

Math   Calculus   
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