Q2 of 176 Page 20

Find the sum of the following geometric series :
to 2n terms;

Common Ratio =

∴ Sum of GP for n terms = …(1)

⇒ , , n = 2n

∴ Substituting the above values in (1) we get

⇒

Find the sum of the following geometric series :

to 5 terms ;

Find the sum of the following geometric series :

(x + y) + (x² + xy + y²) + (x³ + x² y + xy² + y³) + …. to n terms ;

Find the sum of the following geometric series :

1, - a, a², - a³, …. to n terms (a ≠1)

Find the sum of the following geometric series :to 2n terms;