Q. 55.0( 1 Vote )

# Show that the function is

a. strictly increasing on [0, ∞[

b. strictly decreasing on [0, ∞[

c. neither strictly increasing nor strictly decreasing on R

Answer :

Domain of function is **R.**

f’(x)=2x

for x>0 f’(x)>0 i.e. increasing

for x<0 f’(x)<0 i.e. decreasing

hence it is neither increasing nor decreasing in R

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