Tolong dijawab yah guyss

f(x) = l3x+9l
f(-4) = l-12+9l = 3
f(-1) = l-3+9l = 6
f(13) = l39+9l = 48

[tex]f(-4).f(-1)+ \frac{f(13)}{I-3I} \\\\ 3.6+ \frac{48}{3} = 18+16 = 34[/tex]