Could someone please help me with this problem

Theorem 5.1.13 Ler f: D - RR and g: D R and ler c be an accumulation * * C point of D. If lim f ( x) = L, lim g ( x) = M, and KEIR, Then if g( x ) *0 for all XED and MZO, Then lim c ( $ ) ( x ) = h Determine The following limit lim x4-5x+ 4 x1 x 2- 6x+5 lim x - 5x +4 = lim (x-1) (x - 4 ) = lim X-4 X2 1 x 2-6x+5 (x- 1) ( x - 5 ) X- 1 x- S ar x'S S(x) = 0 So I don't Think I Can apply This Theorem. Should I use epsilon- delia instead