Oblicz:
a) (2 ½)² - (½)³
b) (1 ⅔)² · (⅓)⁻¹ - 3³
z góry dziękuję !
a) (2½)² - (½)³= 16/2 - ¼ = 8 - ¼ = 7 ⁴/₄ - ¼ = 7¾
b) (1⅓)² × (⅓)⁻¹ - 3³ = 1¹/₉ × (³/₁)¹ - 9 = 1 ¹/₉ × 3 -9= 1 ¹/₃ - 9 = -7⅔
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a) (2½)² - (½)³= 16/2 - ¼ = 8 - ¼ = 7 ⁴/₄ - ¼ = 7¾
b) (1⅓)² × (⅓)⁻¹ - 3³ = 1¹/₉ × (³/₁)¹ - 9 = 1 ¹/₉ × 3 -9= 1 ¹/₃ - 9 = -7⅔