Răspuns :
(x+1)/x = 5
x+1=5x
x-5x= -1
-4x= -1
x=1/4
(x+1)/x=5 |^2
(x+1)^2/x^2=25
(x^2+2x+1)/x^2 =25
(x^2 +2* 1/4 +1)/x^2 =25
(x^2+1)/x^2 +1/2=25
(x^2+1)/x^2 =25 -1/2
(x^2+1)/x^2= (50-1)/2
(x^2+1)/x^2=49/2
x+1=5x
x-5x= -1
-4x= -1
x=1/4
(x+1)/x=5 |^2
(x+1)^2/x^2=25
(x^2+2x+1)/x^2 =25
(x^2 +2* 1/4 +1)/x^2 =25
(x^2+1)/x^2 +1/2=25
(x^2+1)/x^2 =25 -1/2
(x^2+1)/x^2= (50-1)/2
(x^2+1)/x^2=49/2
Cred ca este vorba despre:
[tex]x+ \frac{1}{x} =5[/tex]
Si ne cere:
[tex] x^{2} + \frac{1}{ x^{2} } =?[/tex]
Vezi atasamentul:
[tex]x+ \frac{1}{x} =5[/tex]
Si ne cere:
[tex] x^{2} + \frac{1}{ x^{2} } =?[/tex]
Vezi atasamentul: