Question

plzz do this as soon as possible. ful process plz

Answer 1

Answer:

Step-by-step explanation:4. answer is

If G.P. is 5/3 & the series is 3 ,then.  

 S(infinity) = a/1-r

 = 3 =a/1-r

 3(1-r)= a

 a-ar=5/3

 3-3r+(3-3r)(r)=5/3

 3^2-3r+3r-3r^2=5/3

 9-9r^2=5

 9-5=9r^2

 = 4 = 9r^2

4/9=r^2

 r^2=2/3