The value of is
As we learnt in
Sum of infinite terms of a GP -
- wherein
first term
common ratio
and
Sum of infinite terms of an AGP -
- wherein
first term
common diff. of a AP
common ratio of a GP
Now let
(ii)
Subtracting (ii) from (i)
We get
From (i)
Option 1)
This option is incorrect.
Option 2)
This option is correct.
Option 3)
This option is incorrect.
Option 4)
This option is incorrect.