26/72 porównaj liczby a) x=81^20 i y=1024^8 b) x=128^36 i y=4^125 c) x= ( 1/27)^-48 i y= 243^28 d) x=(2√2)^28 i y=(√8/64) ^-6​

2672 Porównaj Liczby A X8120 I Y10248 B X12836 I Y4125 C X 12748 I Y 24328 D X2228 I Y864 6 class=

Odpowiedź :

Odpowiedź:

a) x = 81²⁰ = (3⁴)²⁰ = 3⁸⁰

y = 1024⁸ = (2¹⁰)⁸ = 2⁸⁰

x > y

b) x = 128³⁶ = (2⁷)³⁶ = 2²⁵²

y = 4¹²⁵ = (2²)¹²⁵ = 2²⁵⁰

x > y

c) [tex]x = (\frac{1}{27})^{-27}[/tex] = (3⁻¹)⁻²⁷ = 3²⁷

y = 243²⁸ = (3⁵)²⁸ = 3¹⁴⁰

x < y

d) [tex]x = (2\sqrt{2})^{28} = (2*2^{\frac{1}{2})^{28} = 2^{42}[/tex]

[tex]y = (\frac{\sqrt{8}}{64})^{-6} = (\frac{2^{\frac{3}{2}}}{2^{6}})^{-6}=(2^{-\frac{9}{2}})^{-6}=2^{27}[/tex]

x > y