Q22 of 292 Page 549

Find the intervals on which each of the following functions is (a) increasing (b) decreasing.


Consider


f’(x)=4x3-x2


=x2(4x-1)


F’(x)=0 for x=0 and x=1/4



Function f(x) is decreasing for x ∈ (-∞,1/4] and increasing in x ∈ (1/4 , ∞)


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20

Find the intervals on which the function is

(a) strictly increasing (b) strictly decreasing.


 21

Find the intervals on which the function is

(a) strictly increasing (b) strictly decreasing.


 23

Find the intervals on which each of the following functions is (a) increasing (b) decreasing.


 24

Find the intervals on which each of the following functions is (a) increasing (b) decreasing.