Упростите выражение и найдите его значение: 1) - 8/15 а * 3 3/4 b, если а = - 1/3; b = 1/6. 2) - 7/20 х * (-1 1/14) * у * (-2 2/3z), если х = - 3 3/7; у = 14, z = - 5/16

1) - 8/15 * (-1/3) * 3 3/4 * 1/6 = - 8/15 * (-1/3) * 15/4 * 1/6=-1/1 * (-1/3) * 1/1 * 1/3=1/9.

2) - 7/20 * (-3 3/7) * (-1 1/14) * 14 * (-2 2/3) * (-5/16) =

-7/20 * (-24/7) * (-15/14) * 14 * (-8/3) * (-5/16) = -1/1 * (-6/1) * (-1/1) * 1 * (-1/1) * (-5/2) =

-6 * 5/2=-15