Question

A={x|x € IN si x | 18} B={x|x € IN si 7 la puterea2 < 36} C={x|x€ IN, x=3y - 1y € A}

Answer 1

A={x|x € IN si x | 18}

x - divizor a lui 18

D18 - 1,2,3,6,9,18

A = {1,2,3,6,9,18}

B={x|x € IN si 7 la puterea2 < 36}

te rog sa il rescri cum este coresct acest ex, cred ca iti lipseste si x aici 7 la puterea2 < 36

C={x|x€ IN, x=3y - 1y € A}

A = {1,2,3,6,9,18}

x = 3 x 1 -1x1

x = 2

x=3 x 2 - 1 x 2

x=6-2

x= 4

x=3 x 3 - 1 x 3 = 9-3

x=6

x=3 x 6 - 1 x 6=18-6

x=12

x=3 x 9 - 1 x 9 =27-9

x=18

x=3 x 18 - 1 x 18= 54-18

x = 36

C={2,4,6,12,18,36}