Oblicz albo zapisz w postaci potęgi:
a)8⁴*(¼)⁸
b)(0,75)²*12⁵*(1/18)⁴
c)18⁶*(1/108)³
d)54⁵*(⅓)¹⁵
e)(0,2)¹²:(1/125)⁴
f) 0,25*10¹⁰/ to jest licznik
125*50³ to jest mianownik
g) 125:5⁴/ to jest licznik
25⁻² to jest mianownik
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a]
8⁴×(¼)⁸=(2³)⁴×(2⁻²)⁸=2¹²×2⁻¹⁶=2⁻⁴=1/16
b]
(0,75)²×12⁵×(1/18)⁴=⁹/₁₆×12×12⁴×(1/18)⁴=6,75×(12/18)⁴=108/16×(⅔)⁴=108/16×16/81=108/81=12/9=1⅓
c]
18⁶×(1/108)³=18³×18³×(1/108)³=3³=27
d]
54⁵×(⅓)¹⁵=54⁵×(⅓)⁵×(⅓)⁵×(⅓)⁵=(54/27)⁵=2⁵=32
e]
(0,2)²:(1/125)⁴=(⅕)²:[(1/125)²×(1/125)²]=3125²
f]
[0,25×10¹⁰]:[125×50²]=[25×10⁸];[3125×10²]=[25×10⁶];3125=[25000×10³];3125=8×10³=8000
g]
[125:5⁵]:25⁻²=[5³;5⁴];(5)⁻⁴=5⁻¹:5⁻⁴=5³=125