Expression 3: "f" prime left parenthesis, "x" , right parenthesis left brace, "x" less than or equal to "k" , right brace Has graph.f′xx≤k
3
Expression 4: "k" equals 0k=0
00
1010
4
Hidden Label: left parenthesis, "k" , 0 , right parenthesis equals left parenthesis, 0 , 0 , right parenthesis Has graph. To audio trace, press ALT+T.k,0