Question

-3x:(-4,2), при х=1,4;-1ц2/5;2;

Answer 1

3×1,4:4,2

4,2:4,2 = 1

--------

-3×1ц 1/2:(-4,2)

-3×1/2×(-5/21)

1/2×5/7 = 5/14

----------

3×2×5/21

2×5/7

10/7 = 1ц 3/7 или 1.42