Solution:
Given that
As it is given
Their ratio is also greater than 0
; as by applying negative sign change in comparison sign
Thus, condition for to be decreasing
As a result, is decreasing for all
Solution:
Given that
As it is given
Their ratio is also greater than 0
; as by applying negative sign change in comparison sign
Thus, condition for to be decreasing
As a result, is decreasing for all