Question

in an Arithematic progression,if 8thterm is 2times of its 4th term,and 10th term is 30 then,write yhe series

Answer 1

T₈= 2 T ₄ ,

T₁₀=30

Now,
T₈= 2 T ₄ ,
a + 7d = 2(a+3d)
a = d

Tn= a+(n-1)d

T₁₀=a+(10-1)a

30=10a
a = d =3

Therefore, The series are :

3,6,9....