Question

b) How many terms are there in the A.P. 9, 13, 17, 21, ………., 97?​

Answer 1

Answer:

There are 19 terms after 21 to 97

Answer 2

Answer:

first term=9

common difference =13-9=4

last term=97

an=a+(n-1)d

97=9+(n-1)4

97-9=4n-4

88=4n-4

88+4=4n

92=4n

n=23

there is 23 terms