oblicz
a) (1/4)² - (-1/4)³
b) (2/5)² - 2²/5 + 2/5²
c) 100 × (-0,1)³ - 0,1 × 100³
d) 5² × 1/5 - (-1/5)⁰ × (-5)²
a) (1/4)² - (-1/4)³
b) (2/5)² - 2²/5 + 2/5²
c) 100 × (-0,1)³ - 0,1 × 100³
d) 5² × 1/5 - (-1/5)⁰ × (-5)²
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Odpowiedź:
a) (1/4)² - (-1/4)³
= 1/16 - (-1/64)
= 1/16 + 1/64
= 5/64
b) (2/5)² - 2²/5 + 2/5²
= 4/25 - 4/5 + 8/25
= (4+8-20)/25
= -8/25
c) 100 × (-0,1)³ - 0,1 × 100³
= 100 × (-0.001) - 1000
= -0.1 - 1000
= -1000.1
d) 5² × 1/5 - (-1/5)⁰ × (-5)²
= 5 - 1 × 25
= 5 - 25
= -20