Question

pls answer step wise

Answer 1

I think ans
$\frac{9701}{9703}$

Answer 2

The answer is given below :

Now,

$\frac{1 - ( \frac{ {21}^{ - 2} }{22}) }{1 + ( \frac{ {21}^{ - 2} }{22}) } \\ \\ = \frac{1 - \frac{1}{22 \times {21}^{2} } }{1 + \frac{1}{22 \times {21}^{2} } } \\ \\ = \frac{1 - \frac{1}{9702} }{1 + \frac{1}{9702} } \\ \\ = \frac{ \frac{9702 - 1}{9702} }{ \frac{9702 + 1}{9702} } \\ \\ cancelling \: \: 9702 \: \: we \: \: get \\ \\ = \frac{9701}{9703}$

Thank you for your question.