Fredand0708 Fredand0708
  • 22-07-2020
  • Mathematics
contestada

Un número es tres veces otro número. La suma de sus recíprocos es 2/3. Determina los dos números.

Respuesta :

mariacsinning mariacsinning
  • 25-07-2020

Answer:

6 y 2

Step-by-step explanation:

x es el primer número, y es el segundo número.

Un número es tres veces otro número, entonces la ecuación 1 es:

x = 3y

La suma de sus recíprocos es 2/3, entonces la ecuación 2 es:

[tex]\frac{1}{x}+\frac{1}{y}=\frac{2}{3}[/tex]

Reemplazando la ecuación 1 en la 2 y resolviendo para y, nos queda:

[tex]\frac{1}{3y}+\frac{1}{y}=\frac{2}{3}\\\frac{4}{3y} =\frac{2}{3} \\4(3)=2(3y)\\12=6y\\y=2[/tex]

Reemplazando y en la ecuación 1, no queda:

x = 3(2) = 6

Por lo tanto, los dos números son 6 y 2

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