Oblicz wykorzystując własności działań na potęgach: a) 25^2/5^3 b)27^4/81^3 c)4^3*2^3/8^2
a) 25^2/5^3=
25² ( 5²) ² 5 ⁴
---------= -------- = ------- = 5⁴ ⁻³= 5
5³ 5³ 5³
b)27^4/81^3 =
27⁴ (3 ³) ⁴ 3 ¹²
---------=--------- ---= ---- = 3¹²⁻¹²= 3⁰= 1
81³ ( 3 ⁴) ³ 3 ¹²
c)4^3*2^3/8^2=
4³ * 2³ ( 2²)³ *2³ 2⁶ * 2³ 2 ⁹
---------= -------------=--------= ------= 2⁹⁻⁶ = 2³
8² (2 ³)² 2⁶ 2 ⁶
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a) 25^2/5^3=
25² ( 5²) ² 5 ⁴
---------= -------- = ------- = 5⁴ ⁻³= 5
5³ 5³ 5³
b)27^4/81^3 =
27⁴ (3 ³) ⁴ 3 ¹²
---------=--------- ---= ---- = 3¹²⁻¹²= 3⁰= 1
81³ ( 3 ⁴) ³ 3 ¹²
c)4^3*2^3/8^2=
4³ * 2³ ( 2²)³ *2³ 2⁶ * 2³ 2 ⁹
---------= -------------=--------= ------= 2⁹⁻⁶ = 2³
8² (2 ³)² 2⁶ 2 ⁶