Răspuns :
x+1/x=3
x+1=3x
2x=1
x=1/2
x la patrat+1/x patrat= (1/4+1)/1/4=5/4:1/4=5
raspuns;5
x+1=3x
2x=1
x=1/2
x la patrat+1/x patrat= (1/4+1)/1/4=5/4:1/4=5
raspuns;5
[(x+1)/x]^2=x^2+2x+1/x^2
x+1=3x
3x-x=1
2x=1
x=1/2
(1/4+1/2+1)/ 1/4
(2/8+4/8+8/8)*4
14/8*4
14/2
9