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MaTEX Logaritm os Logaritmos - Amolasmates

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Soluciones a l<strong>os</strong> Ejercici<strong>os</strong> 44<br />

Ejercicio 8(j)<br />

log 2(x 2 − 1) − log 2(x + 1) =1<br />

log 2<br />

x 2 − 1<br />

x + 1 = log 2 2<br />

x 2 − 1<br />

x + 1 =2<br />

x 2 − 2x − 3 = 0 =⇒x = 2 ∨ −1<br />

El valor −1 no es válido pues en la ecuación inicial quedaría log 2 0 que no<br />

existe.<br />

<br />

MATEMATICAS<br />

1º Bachillerato<br />

A<br />

d<br />

B<br />

s = B + m v<br />

r = A + l u<br />

SOCIALES<br />

<strong>MaTEX</strong><br />

<strong>Logaritm</strong><strong>os</strong><br />

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