Answer:
21,24,29
5
Step-by-step explanation:
for the first three terms, put n = 1,2,3
for the second part,
n^2 + 20 = 50
from this we knwo n is 5.5
so, the sixth term is larger than 50,since there can't be a 5.5th term
that means there are 5 terms smaller than 50
