What are the next three terms for 1, 1, 2, 3, 5, 8, 13, 21, 34. How can you get each term from the previous two terms?

The next 3 terms are 55, 89, 123 because in this sequence you add the 2 numbers that came before to get the next number for example 1+1=2 and then 1+2=3, 2+3=5 and so on. to get 55 it would be 21+34=55. 89 is 55+34. And 123 is 89+55.

Add the previous 2 terms for the next one ...

34+21 = 55

55+34 = 89

89+55 = 144

Next 3 terms are 55, 89, and 144.