Find the limit (if it exists). (If an answer does not exist, enter DNE.)
lim f(x) as x approaches 3, where f(x)=
x^2-8x+9 if x<3
-x^2+8x-21 if x>/3 (greater than or equal to 3)
lim f(x) as x approaches 3, where f(x)=
x^2-8x+9 if x<3
-x^2+8x-21 if x>/3 (greater than or equal to 3)