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√(√2 -1)² = I √2 -1I= √2 -1, bo √2 -1>0
Suma liczb przeciwnych =0
√2 -1 +1- √2= 0 ⇒ podane liczby są przeciwne c.n.d.
ZAD.3B)
(3⁻⁴ : (1/3)² ) · (1/3)⁻¹ = (3⁻⁴ : 3⁻²) ·3¹= 3 ⁻⁴ ⁺² · 3¹ = 3⁻²· 3¹ = 3⁻¹ =1/3
AD.3C)
(0,6)¹⁴ · (1 2/3) ⁻¹⁶= (3/5) ⁻¹⁴·(5/3) ⁻¹⁶= (3/5)⁻¹⁴ · (3/5)¹⁶= (3/5)⁻¹⁴⁺¹⁶ = (3/5)²= 9/25