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HYPOTHESIS: a hypothesis is what you think will happen. You should try starting it off with my hypothesis is... next it will.... then it will... finally it will...
It is an addend or subtrahend but almost nobody uses those terms.
1 squared, 2 squared, 3 squared etc so the next 3 terms are 36,49 and 64.
Look at the differences bettween the terms: 9-2=7, 5-9=-4, 13-5=8, 10-13=-3The differences finally are: 7,-4,8-3,9,-2. The next difference must be 10, so the next term is 27(27-17=10) and the next difference must be -1, so the next term must be 26(26-27=-1). Finally, the sequence is: 2 9 5 13 10 19 17 27 26 and so on.
15 19