Пошаговое объяснение:
а/12 * 16/d = a/3 * 4/d = 4a/3d
1) a = 5; d = 35
4a/3d = (4*5)/(3*35) = 20/105 = 4/21
2) a = 7; d = 49
4a/3d = (4*7)/(3*49) = 28/147 = 4/21
3) a = 9; d = 45
4a/3d = (4*9)/(3*45) = 36/135 = 4/15
4) a = 3; d = 4
4a/3d = (4*3)/(3*4) = 12/12 = 1
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Пошаговое объяснение:
а/12 * 16/d = a/3 * 4/d = 4a/3d
1) a = 5; d = 35
4a/3d = (4*5)/(3*35) = 20/105 = 4/21
2) a = 7; d = 49
4a/3d = (4*7)/(3*49) = 28/147 = 4/21
3) a = 9; d = 45
4a/3d = (4*9)/(3*45) = 36/135 = 4/15
4) a = 3; d = 4
4a/3d = (4*3)/(3*4) = 12/12 = 1