Proektsoftbg

f_1(x) = switch(x < 1; 1; _
                x < 2; 2; _
                x < 3; 3; _
                x < 4; 4; _
                x < 5; 5; _
                x < 6; 6; _
                x < 7; 7; _
                x < 8; 8; 9)
f_2(x) = if(x > 9; 8; max(x - 1; 0))
$Plot{f_1(x) & f_2(x) @ x = 0 : 10}