Question

Find the 20 and na term of the GP
5/2,5/4,5/8​

Answer 1

Answer:

Step-by-step explanation:

a= 5/2

r = (5/2)/(5/4) = 2

so , A20 = a( r^n - 1)/ r - 1

               = 5/2(2^20 - 1)/ 2 - 1

                =  5/2(2^20 - 1)

and An =  a( r^n - 1)/ r - 1