1) -8/15a*3 3/4b, если a=-1/3, b=1/6;
2) -7/20x*(-1 1/14)*y*(-2 2/3z), ecли х=-3 3/7, у=14, z=-5/16.

1) -8/15а * 3 3/4b, если а = -1/3, b = 1/6[-8/15 * (-1/3)] * [3 3/4 * 1/6] = 1/91) -8/15 * (-1/3) = 8/452) 3 3/4 * 1/6 = 15/4 * 1/6 = 15/24 = 5/83) 8/45 * 5/8 = 5/45 = 1/9Ответ: 1/9.2) -7/20х * (-1 1/14)у * (-2 2/3)z, если х = -3 3/7, у = 14, z = -5/16[-7/20 * (-3 3/7)] * [(-1 1/14) * 14] * [(-2 2/3) * (-5/16)] = -151) -7/20 * (-3 3/7) = 7/20 * 24/7 = 24/20 = 6/5 2) -1 1/14 * 14 = -15/14 * 14 = -153) -2 2/3 * (-5/16) = 8/3 * 5/16 = (1*5)/(3*2) = 5/64) 6/5 * (-15) = 6 * (-3) = -185) -18 * 5/6 = -3 * 5 = -15 Ответ: -15.