Y' = 3(7x+4) + 7(3x-2)
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6-2а*70+7b=420-140a+42b-14ab
А)2*(14/15:2/3)=2,8
1)14/15:2/3=14/15*3/2=7/5
2)2*7/5=14/5=2,8
б)12/11:3/4*11/24=2/3
1)12/11:3/4=12/11*4/3=16/11
2)16/11*11/24=2/3
в)1/2*2/3*3/4*4/5=1/5=0,2
5269242.....................
1) 2, 4, 7, 11,16, 22, 29, 37, 46, 56.
2)10, 8, 11, 9, 12, 10, 13, 11, 14, 12, 15.
3) 3, 6, 10, 13, 17, 20, 24, 27, 31.