Odpowiedzi

2010-01-22T16:59:00+01:00
A) 1⅚+1/12 : 2i3/5 = 11/6 + 13/12 : 13/5 = 11/6 +13/12 * 5/13 = 11/6 + 5/12 = 22/12 + 5?12 = 27/12 = 2.25 = 2 i 25/10

b) 2/5 - 1/5(2,5 - 1,2 * 5/8) = 2/5 - 1/5(2,5 - 12/10 * 5/8) =
= 2/5 - 1/5(2,5 - 3/2 * 1/2) = 2/5 - 1/5(2,5 - 3/4) = 2/5 - 1/2 - 3/4 =
= (4/10 - 5/10) - 3/4 = -(1/10) - 3/4 = -(4/40) - 30/40 = -(34/40) = 0,85 = 85/100

c) (1i 1/4)^2 = (-5/4)^2 = 25/16

d) ∛-125 + √16/9 = -5 + 4/3 = -5 + 1i1/3 = -4i2/3

e) (3√5)² /5 = 9*5 /5 = 45/5 = 9
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