Question

(Q:1) If the fifth term of a G.P. is 80 and first term
is 5, what will be the 4th term of the G.P.?​

Answer 1

Answer:

40

Step-by-step explanation:

5th term = 80

So, ar^5-1=80

      ar^4=80

Given: a = 5

5*r^4=80

r^4=16

r^4=(2)^4

So, r=2

4th term = ar^4-1

5*2^3=5*8=40