whenever a function is expressed in terms of another function,how do we find whether the function is increasing or decreasing?(adsbygoogle = window.adsbygoogle || []).push({});

say ,for example ,we have :

h(x)= f(2x)+f(x)

pls tell anyone,what procedure we need to follow to find whether the above given function is increasing/monotonically increasing or decreasing/monotonically decreasing.thanks !

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# Monotonically increasing/decreasing functions

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