Răspunsuri

2014-09-03T11:42:06+03:00
(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
2014-09-03T11:57:32+03:00