Respuesta :

devishri1977

Answer:

Step-by-step explanation:

LCM  of 5 , 2 and 4 = 20

[tex]\dfrac{1}{5}+\dfrac{1}{2}+\dfrac{1}{4}=\dfrac{1*4}{5*4}+\dfrac{1*10}{2*10}+\dfrac{1*5}{4*5}\\\\=\dfrac{4}{20}+\dfrac{10}{20}+\dfrac{5}{20}\\\\=\dfrac{4+10+5}{20}\\\\=\dfrac{19}{20}[/tex]

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