Question

find sum of series to nth term
${1}^{2} + {3}^{2} x + {5}^{2} {x}^{2} + {7}^{2} {x}^{3} ....$
answer is
$\frac{1 + 7x}{ {(1 - x)}^{2} } + \frac{8 {x}^{2} }{ {(1 - x)}^{3} }$
I need explaination fast plz
​

Answer 1

Answer:

can plz give questions easy and it should be for 8th class