Question

14. Penyelesaian dari 2x + 4 ≤ 5x + 10 adalah… .
A. x ≤ 2
B. x ≥ 2
C. x ≤ −2
D. x ≥ −2

15. Jika A = { x| 4 ≤ x ≤ 8 , x bilangan asli } dan B = { x| x < 7 , x bilangan cacah },
maka A B = ….
A. { 4, 5, 6 }
B. { 4, 5, 6, 7 }
C. { 0,1, 2, 3, 4, 5, 6 }
D. { 0. 1, 2, 3, 4, 5, 6, 7, 8 }

Answer 1

14.2x+4 ≤ 5x+10
    2x-5x ≤ 10-4
    -3x    ≤ 6
      -x   ≤ 2
        x  ≤ -2(C)
15. A = {4,5,6,7,8}
     B = {0,1,2,3,4,5,6}
     AUB={0,1,2,3,4,5,6,7,8}
     AПB={4,5,6}