А) 2/5 и 5/12 = 8/60 и 25/60Б) 5/12 и 7/8 = 10/24 и 21/24В) 6/17 и 11/34 = 204/578 и 187/578Г) 5/16 и 5/12 = 15/48 и 20/48Д) 7/33 и 3/77 = 48/231 и 9/231Е) 5/22 и 2/55 = 25/110 и 4/110Ж) 4/15 и 3/20 = 16/60 и 9/60З) 5/121 и 8/99 = 40/1089 и 88/1089И) 1/72 и 1/56 = 7/504 и 9/504К) 1/48 и 1/72 = 3/144 и 2/144Л) 2/77и 3/44 = 8/308 и 21/308М) 1/51 и 1/68 = 4/204 и 3/204Н) 5/36 и 7/54 = 15/108 и 14/108О) 9/35 и 11/45 = 81/315 и 77/315П) 4/49 и 5/63 = 36/441 и 35/441Р) 15/98 и 13/72 = 540/3528 и 637/3528 вот чтото типо того)
=0,8 * 3а + 0,8 * (-14) - 0,6*6а - 0,6 * (-8) =
=2,4а - 11,2 - 3,6а +4,8 =
= (-3,6 +2,4)а + (-11,2 +4,8) =
= -1,2а -6,4
при а = - 3 1/12
- 1,2 * (- 3 1/12) - 6,4 = - 12/10 * (- 37/12 ) - 6,4 =
= 3,7 - 6,4 = - (6,4 - 3,7) = -2,7
6 1/9 * (t -9) + 2 5/9 * (18-t) =
= 6 1/9 * t + 6 1/9 * (-9) + 2 5/9 * 18 + 2 5/9 * (-t) =
= (6 1/9 - 2 5/9 ) *t + (-55 +46) =
= 3 5/9 * t - 9
при t=0.2
3 5/9 * 0.2 - 9 = 32/9 * 1/5 - 9 = 32/45 - 9 = -8 13/45