Find the sum of the following geometric progressions :
to n terms
Common Ratio = r = 
∴ Sum of GP for n terms = 
…(1)
⇒ a = (a2 - b2), r = (a + b), n = n
∴ Substituting the above values in (1) we get
⇒ 
1
Find the sum of the following geometric progressions :
to n terms
Common Ratio = r =
∴ Sum of GP for n terms = …(1)
⇒ a = (a2 - b2), r = (a + b), n = n
∴ Substituting the above values in (1) we get
⇒