Question

Find Sn of p , q , p²/q , q³/p.

By using both the following formulae

$sn \: = \frac{a(1 - {r}^{n}) }{1 - r}$
and

$sn \: = \frac{a( {r}^{n} - 1) }{r - 1}$

Solve step by step....​

Answer 1

Answer:

$= a(1 - {p2) \div }(1 - p) \\ = a(1 - p) \\ and \\ = a( {p}^{ 3} - 1) \div p - 1 \\ = a( {p}^{2} - 1)$

Answer 2

Answer:

Step-by-step explanation:

=a(1-p2)÷(1-p)

=a (1-p)

And

=a (p3-1)÷p-1

=a (p2-1)