Question

a = 13; a = 3 find a1,a3​

Answer 1

Answer:

ans - 13 and9 is your answer

Answer 2

ANSWER

Given AP

a

2

=13 a

4

=3

a

2

=a+(n−1)d=a+d

a

4

=a+(4−1)d=a+3d

Here a+d=13 __ (1)

a+3d=3 __ (2)

(2) - (1) ⇒2d=−10

d=−5

substitute d= -5 in (1)

a-5 = 13

a = 18

∴a

1

=a=18

a

3

=a+2d=18+2(−5)

=8