Diket barisan bilangan 1, 4, 9, 16,... Selisih U9 - U7 adalah .. a. 32 b. 33 c. 34 d. 35 e. 36

U1 = 1
U2 = 1 + 3 = 4
U3 = 4 + 5 = 9
U4 = 9 + 7 = 16
U5 = 16 + 9 = 25
U6 = 25 + 11 = 36
U7 = 36 + 13 = 49
U8 = 49 + 15 = 64
U9 = 64 + 17 = 81

U9 - U7
= 81 - 49
= 32 (A)

Semoga Membantu!!!