Oblicz :
(7√2 - 3√8)√2 = 7√2 * √2 - 3√8 * √2 = 7 * 2 - 3√(2 * 8) = 14 - 3√16 = 14 - 3 * 4 = 14 - 12 = 2
∛25 : ∛(1/5) = ∛(25 : 1/5) = ∛(25 * 5) = ∛125 = ∛(5³) = 5
(7√2 - 3√8)√2 = 7√2 *√2 - 3√8 * √2 = 7*2 - 3√8*2 = 14 -3√16 = 14 -3*4 = 14-12 =2
³√25 ; : ³√1/5 = 25¹ʹ³ : (1/5)¹ʹ³ =( 5²)¹ʹ³ : (5¯¹)¹ʹ³ = 5²ʹ³ : 5 ¯¹ʹ³ = 5²ʹ³ ¯ ⁽¯¹ʹ³⁾ = 5 ²ʹ³ ⁺¹ʹ³ = 5¹ = 5
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(7√2 - 3√8)√2 = 7√2 * √2 - 3√8 * √2 = 7 * 2 - 3√(2 * 8) = 14 - 3√16 = 14 - 3 * 4 = 14 - 12 = 2
∛25 : ∛(1/5) = ∛(25 : 1/5) = ∛(25 * 5) = ∛125 = ∛(5³) = 5
(7√2 - 3√8)√2 = 7√2 *√2 - 3√8 * √2 = 7*2 - 3√8*2 = 14 -3√16 = 14 -3*4 = 14-12 =2
³√25 ; : ³√1/5 = 25¹ʹ³ : (1/5)¹ʹ³ =( 5²)¹ʹ³ : (5¯¹)¹ʹ³ = 5²ʹ³ : 5 ¯¹ʹ³ = 5²ʹ³ ¯ ⁽¯¹ʹ³⁾ = 5 ²ʹ³ ⁺¹ʹ³ = 5¹ = 5