Respuesta :
Answer:
17
Step-by-step explanation:
2 (+1), 3 (+2), 5 (+3), 8 (+4), 12 (+5), 17
: the next number should be 17.
: they are adding one on each time i.e. +1, +2, +3, +4, +5....
: they are adding one on each time i.e. +1, +2, +3, +4, +5....