Question

Tulislah 4 suku pertama barisan bilangan jika Un=3n-9

Answer 1

U1 = 3(1) - 9
U1 = 3 - 9
U1 = -6

U2 = 3(2) - 9
U2 = 6-9
U2 = -3

U3 = 3(3) - 9
U3 = 9 - 9
U3 = 0

U4 = 3(4) - 9
U4 = 12 - 9
U4 = 3

U1,U2,U3,U4 = -6, -3, 0, 3

Answer 2

U1 = -6 ( 3x1-9)
u2= -3 (3x2-9)
u3 = 0(3x3-9)
u4 = 3(3x4-9)