a) 10 - 2 * ( 3 i 1/5 - 2 i 1/4 * 1/3) = 10 - 2* (16/5 - 9/4 * 1/3) = 10 - 2*(64/20-3/4)= = 10-2*(64/20-15/20) = 10-2*49/20 = 10 - 98/20= 10- 4,9 = 5,1 b) ( 7/3 - 5/12 + 1 i 1/2) : ( 2 i 3/4 - 5/6) = (28/12 - 5/12 + 3/2) : (11/4-5/6) = = (23/12 + 3/2) :(33/12 - 10/12) = (23/12 + 18/12) : 23/12 = 41/12 : 23/12 = 41/23
a) 10-2 *(3i1/5 -2i1/4 *1/3) = 10 - 2* (3i1/5 - 9/4 *1/3) = 10 -2 *(3i1/5 - 3/4 *1/1) = = 10 - 2 * (3i1/5 - 3/4) = 10 -2 *(3i4/20 - 15/20) = 10 -2 *(2 i24/20 - 15/20) = = 10 - 2 *(2i9/20) = 10 -2 *49/20 = 10 -1*49/10= 10 - 49/10 = = 100/10 - 49/10 = 51/10 = 5i1/10 b) (7/3 - 5/12 +1i1/2) : (2i3/4 -5/6) = (28/12 - 5/12 + 1i6/12) : (2i9/12 -10/12) = = (2i4/12 -5/12 +1i6/12): (1i21/12 - 10/12) = 3i5/12 : 1i11/12 = 41/12 : 23/12= = 41/12 * 12/23 = 41/1 * 1/23 = 41/23 = 1i 18/23