Answer:
Step-by-step explanation:
LCM = (a -3)(a-4)(a-5)
[tex]\dfrac{1}{(a-3)(a-4)}+\dfrac{1}{(a-4)(a-5)}+\dfrac{1}{(a-5)(a-3)}\\\\\\ = \dfrac{1*(a-5)}{(a-3)(a-4)(a-5)}+\dfrac{1*(a-3)}{(a-4)(a-5)(a-3)}+\dfrac{1*(a-4)}{(a-5)(a-3)(a-4)}\\\\\\=\dfrac{a-5+a-3+a-4}{(a-4)(a-3)(a-5)}\\\\\\=\dfrac{3a - 12}{(a-3)(a-4)(a-5)}\\\\\\=\dfrac{3(a-4)}{(a-3)(a-4)(a-5)}\\\\\\=\dfrac{3}{(a-3)(a-5)}[/tex]
