Question

wer \: it}" alt="\huge \dag \sf{Answer \: it}" align="absmiddle" class="latex-formula">​
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Answer 1

$\huge \tt༆ Answer ༄$

The required expression is ~ B

$\boxed{ \sf \: F = \dfrac{ RN }{ 1 - R} }$

Refer to the attachment for Solution ~

Answer 2

Answer:

$option \: (b) \: is \: ur \: answer \: to \: the \: question \:$

$to \: know \: the \: answer \: with \: proof$

$refer \: to \: the \: above \: attatchment$

$f = \frac{rn}{1 - r}$