oblicz wartość wyrażenia wymiernego: a) b) c)
a)jesli dobrze przepisalas zadanie to masz: x=-3y=2, czyli o x=2 y=-2/3 zatem(5*2-4/3)/2 = 5-2/3 = b) podstawiam:(2-3)/(2+2*sqrt(2*3)= -1/(2+sqrt(6)) *(2-sqrt(6))/(2-sqrt(6)) = -(2+sqrt(6))/(2^2+(2*sqrt(6))^2) =[-1(2-2*sqrt(6))] / (4-24) = (1-sqrt(6))/(10)
c)skracam x i mam:3/(2x-5) = 3/(2sqrt3-3) * ((2sqrt3+3)/(2sqrt3+3)) = 3((2sqrt3+3)/(12-9) <trojki sie skrócą> = 2sqrt3+3
a)
b)
c)
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a)
jesli dobrze przepisalas zadanie to masz: x=-3y=2, czyli o x=2 y=-2/3 zatem
(5*2-4/3)/2 = 5-2/3 =
b) podstawiam:
(2-3)/(2+2*sqrt(2*3)= -1/(2+sqrt(6)) *(2-sqrt(6))/(2-sqrt(6)) = -(2+sqrt(6))/(2^2+(2*sqrt(6))^2) =
[-1(2-2*sqrt(6))] / (4-24) = (1-sqrt(6))/(10)
c)
skracam x i mam:
3/(2x-5) = 3/(2sqrt3-3) * ((2sqrt3+3)/(2sqrt3+3)) = 3((2sqrt3+3)/(12-9) <trojki sie skrócą> = 2sqrt3+3
a)
b)
c)