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Rafix: jak to rozwiazac? xx=(x)x
15 mar 17:12
Tragos: D: x > 0 xx = (x)x xx = (x1/2)x xx = x1/2x
 1 
x =

x
 2 
2x = x x − 2x = 0 x(x − 2) = 0 x = 0 lub x = 2 (x = 0 lub x = 4) i x ∊ D x = 4
15 mar 17:16
Basia: x>0 dla x=1 równanie jest prawdziwe 11 = (1}1 dla x≠1 x(x1/2) = (x1/2)x x(x1/2) = xx/2 logx[x(x1/2)] = logx[xx/2] x1/2 = x2 2x = x x − 2x = 0 x*(x − 2) = 0 x = 0 odpada x = 2 x =4 −−−−−−−−−−−−−−−−−−−
15 mar 17:19
Basia:dwa rozwiązania: x=1 lub x=4
15 mar 17:20