18/54 = 1/3
To find the common ration in a geometric sequence, divide one term by its preceding term: r = -18 ÷ 6 = -3 r = 54 ÷ -18 = -3 r = -162 ÷ 54 = -3
81
47 AND 34
The next number is 54. The sequence is generated by the rule: Un = (n4 - 11n3 + 51n2 - 107n + 102)/4 for n = 1, 2, 3, ... and U6 = 54.
The pattern looks like the previous number is multiplied by -3, hence the next number in the sequence would be (-54) x (-3) = 162
what is the arthmetic sequence of 1 6 3 18 54 27 ? what is the missing terms ?
-2
6, 2, ⅔
Each number is 3 times the previous number so they would be 162, 486, and 1,458.
9 243 - 81 = 162 81 - 27 = 54 162 = 54 * 3 54 = 18 * 3 27 - 18 = 9
6 12 9 18 15 30 27 54 51
216
54
162 and 486 the pattern is that the next number is three times the previous number.
66, 60 & 54... You're simply subtracting 6 each time !
18/54 = 1/3