ile rozwiązań ma równanie : 2-1/x=x
obliczenia sa najważniejsze
2 - 1/x = x /·x
2x - 1 = x²
x² - 2x +1 = 0
x² - x - x + 1 = 0
x · ( x-1) - 1·( x-1) = 0
( x -1)·( x - 1) = 0
x =1
Odp.: x =1
2 - 1/x = x D = R \ {0}2x/x - 1/x = x(2x - 1) / x = x / 1x² = (2x - 1) * 1x² = 2x - 1x² - 2x + 1 = 0(x - 1)² = 0²x - 1= 0x = 1odp. Równanie posiada 1 rozwiazanie postaci x = 1
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2 - 1/x = x /·x
2x - 1 = x²
x² - 2x +1 = 0
x² - x - x + 1 = 0
x · ( x-1) - 1·( x-1) = 0
( x -1)·( x - 1) = 0
x =1
Odp.: x =1
2 - 1/x = x
D = R \ {0}
2x/x - 1/x = x
(2x - 1) / x = x / 1
x² = (2x - 1) * 1
x² = 2x - 1
x² - 2x + 1 = 0
(x - 1)² = 0²
x - 1= 0
x = 1
odp. Równanie posiada 1 rozwiazanie postaci x = 1