Sec 1.1, Pr 4 In(5]:= f4 [x_] : = If [x > 2, (2x -4) / (x +1) , 2/ (3-x) ] The graph below shows the graph of the function; at x=2 the function is defined as f(2)=2. It is denoted by the black dot at x=2. In[10]:= Show [Plot [f4 [x] , {x, -5, 5}], ListPlot [ { {2, 2)}]] 2.0 1.5 Out[10]= 1.0 0.5 -4 -2 2 Find (a) lim f (x) = ... (b) lim f (x) = ... X-2- X- 2+ (c) lim f (X) = ... (d) f (2) = ... X-2