Question

In a G.P., the fourth term is 48 and the eighthterm is 768. Find the tenth term.​

Answer 1

Answer:

T4=48 T8=768

Step-by-step explanation:

T4=48

a+3d=48~[1]

T8=768

a+7d=768~[2]

subtract eqn 1-2

a+3d=48

a+7d=768

-4d=-720

d=720

4

d=180

in eqn 1

a+3(180)=48

a+540=48

a=48-540

a=-492

T10=a+(n-1)d

=-492+(10-1)180

=-492+(9)180

=-492+1620

T10=1129