The sequence shows that the numbers will be:
a. 10,26, 74, 218, 650.
b. 1,6,14,38 and 110.
a. First number = 10
2nd number = (3 × 10) - 4 = 26
3rd number = (3 × 26) - 4 = 74
4th number = (3 × 74) - 4 = 218
5th number = (3 × 218) - 4 = 650
b. First number = 1
2nd number = (1 × 10) - 4 = 6
3rd number = (3 × 6) - 4 = 14
4th number = (3 × 14) - 4 = 38
5th number = (3 × 38) - 4 = 110
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