Odpowiedź:
Szczegółowe wyjaśnienie:
9.
Oznaczymy:
a) x =2√3 -> x² = 4*3 = 12
y = 3√2 -> y² = 9*2 = 18
3√2 > 2√3
b) x=2∛54 -> x³ = 8*54 = 432
y = 3∛16 -> y³ = 27 *16 = 432
2∛54 = 3∛16
c) x = √3*∛5 -> x^6 = 3³ * 5² = 27*25 = 675
y = √5 *∛2 -> y^6 = 5³ * 2² = 125*4 = 500
√3*∛5 > √5 *∛2
10.
a) (√45 -2√20)/2√5 = (3√5-4√5)/2√5 = -√5/2√5 = - 1/2
b) (2√75-3√48)/(√12-√108) = (10√3-12√3)/(2√3-6√3) = -2√3/(-4√3) =
1/2
c) (∛135-∛40)/∛5 = (∛27*5 - ∛8*5)/∛5 = (3∛5-2∛5)/∛5 = ∛5/∛5 = 1
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Odpowiedź:
Szczegółowe wyjaśnienie:
9.
Oznaczymy:
a) x =2√3 -> x² = 4*3 = 12
y = 3√2 -> y² = 9*2 = 18
3√2 > 2√3
b) x=2∛54 -> x³ = 8*54 = 432
y = 3∛16 -> y³ = 27 *16 = 432
2∛54 = 3∛16
c) x = √3*∛5 -> x^6 = 3³ * 5² = 27*25 = 675
y = √5 *∛2 -> y^6 = 5³ * 2² = 125*4 = 500
√3*∛5 > √5 *∛2
10.
a) (√45 -2√20)/2√5 = (3√5-4√5)/2√5 = -√5/2√5 = - 1/2
b) (2√75-3√48)/(√12-√108) = (10√3-12√3)/(2√3-6√3) = -2√3/(-4√3) =
1/2
c) (∛135-∛40)/∛5 = (∛27*5 - ∛8*5)/∛5 = (3∛5-2∛5)/∛5 = ∛5/∛5 = 1