Question

in an AP the 7th term is 13 and third term is 7 find a and d in the method of elimination​

Answer 1

this is the answer hope it helps u

Answer 2

Answer:

Step-by-step explanation:

Given

a7 = 13 = a+(7-1)d

13= a+6d ---------eq 1

a3= 7 = a +2d ------- eq 2

Eq1 - eq2 = (13-7) = (a-a) + 6d-2d

=> 6 = 4d

d = 3/2

a= 7-2d = 7-3 = 4