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f(x)=x 3 is increasing in? i think (-infinity,1)U(1,infinity) but key shows (-infinity,infinity)

f(x)=x3 is increasing in?
i think (-infinity,1)U(1,infinity) but key shows (-infinity,infinity)

Grade:12th pass

2 Answers

Shubham Singh
199 Points
5 years ago
 fI(x) = 3 x2 which is always greater than zero. hence it is incresing in (-infinity,infinity).
 
Prajwal Kavad
603 Points
5 years ago
x3  is strictly increasing function and  fI(x) = 3x2 ,
 is always greater than zero hence its increasing
always hence in it incresing in (-infinity,infinity)
 all the best
 
 
plz approve
 

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