Q. 1 C3.7( 3 Votes )

# Find out<

Answer :

The given arithmetic progression is 9, 13, 17, 21, …
Its first term a = 9
Common difference = d = 13 – 9 = 4.
So nth term an of the given arithmetic progression is given by
an = a + (n -1)d

Where,

a = First term of AP
d = Common difference of AP
and no of terms is ‘n’

Thus 24th term a24 = 9 + (24 - 1) × 4.
a24 = 9 + 23 × 4 = 9 + 92 = 101

Hence, 24th term is 101.

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