Question

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)

Answer 1