Question

Ułamki :
1.2/7 *(-1i3/4)-2i1/3:(1i1/6)

2.-3i1/2-(1i3/4-2i1/5):(-3i1/3)

3.2i1/3+(1/7-3i3/5)*(-7/19)

4.(3i4/5-2i3/4):(-1i1/2)

Answer 1

Chyba wszystko rozpisane

Answer 2

1) 2/7 *(-1i3/4) -2i1/3 : (1i1/6) = 2/7 *(-7/4) - 7/3 : 7/6 = 1/1 * 1/2 - 7/3 * 6/7 =
    1/2 - 1/1 * 2/1 = 1/2 - 2 = 1/2 - 1i2/2 = -1i1/2

2) -3i1/2 - (1i3/4 -2i1/5) : (-3i1/3) =
    -3i1/2 - (1i15/20 -2i4/20) : (-10/3)=
    -3i1/2 - ( 35/20 - 44/20) :(-10/3) =
    -3i1/2 + 9/20 *(-3/10) =
    -3i1/2 - 27/200 = -3i100/200 - 27/200 = -3i127/200 

3)
 2i1/3 +(1/7 -3i3/5) * (-7/19) = 
 2i1/3 + (5/35 - 3i21/35 ) *(-7/19) =
 2i1/3 + (-3i16/35) *(-7/19) =
 2i1/3 +  (-121/35) *(-7/19) =
 2i1/3 + (-121/5) *(-1/19) =
2i1/3 + 121/95 = 
2i1/3 + 1i26/95 =
2i95/285 + 1i78/285 = 3i173/285

4) (3i4/5- 2i3/4) : (-1i1/2) =
    (3i16/20 - 2i15/20) : (-3/2) =
    1 i1/20 : (-3/2) =
     21/20 * (-2/3) = 
    7/10 * (-1/1) = -7/10