Jika diketahui barisan 9/2, 3, 3/2, 0 tentukan nilai U10 ×U16

Bab Barisan dan Deret
Matematika SMP Kelas VIII

9/2 = 4,5
3
3/2 = 1,5

a = 9/2

b = 3 - 9/2
b = 6/2 - 9/2
b = -3/2

U10 = a + 9 x b
U10 = 9/2 + 9 x (-3/2)
U10 = 9/2 - 27/2
U10 = -18/2
U10 = -9

U16 = a + 15 x b
U16 = 9/2 + 15 x (-3/2)
U16 = 9/2 - 45/2
U16 = -36/2
U16 = -18

U10 x U16
= (-9) x (-18)
= 162