5. 2, 4, 8, 16, 32, 64, 128, ... a. By multiplying by 2, the number in each term doubled its value as the sequence continues. b. By multiplying by 2, the number in each term tripled its value as the sequence continues. C. By multiplying by 3, the number in each term doubled its value as the sequence continues. d. By multiplying by 3, the number in each term tripled its value as the sequence continues.​