Question

an
Qalo
40) gn
will
(A) 10
АР
be :
and d=10, Second term of AP
(B) 20
(230
D):40​

Answer 1

Answer:

answer is 9

Explanation:

Let the general form of A.P., a

n

=a+(n−1)d

Common difference, d=10

a

n

=100

a

n

=a+(n−1)d

100=20+(n−1)×10

100−20=10n−10

80+10=10n

90=10n

n=9