Here's the question you clicked on:
wwe123
find the range of function (i)cos x/3
\[(ii) \frac{ x+2 }{ |x+2| }\]
(1) it is a cosine function so range always lies [-1,1] for all values of x (2) {-1,1} for all values of x except x=-2 for which function is not defined:)