Odpowiedzi

2009-10-12T23:51:49+02:00
Oblicz:
2⁻²+5/ (0,5)⁻¹-5(-2)⁻²+⅔⁻² +4,75=1/4+5 / 2- +5/4+ 9/4 + 4,75=
1/4+5 / 2+1 + 4,75=1/4+5 / 3 + 4,75=21/4 / 7,75=21/4 / 7 3/4=
21/4 / 31/4=21/31
2009-10-12T23:53:58+02:00
2⁻²+5/ (0,5)⁻¹-5(-2)⁻²+⅔⁻² +4,75 =
¼+5/2-5*(¼)+9/4+4,75 =
(21/4) / (8/4-5/4+9/4+19/4) =
(21/4)/(31/4) =
21/4*4/31 =
21/31