Consider the function f defined by ()=83f(x)=8x3. Which quantities would need to be related to show that 1()=5limx1f(x)=5 using the formal definition of the limit?

Consider the function f defined by f(x) = 8x 3. Which quantities would need to be related to show that limx_,1f(x) = 5 using the formal definition of the limit