1.

The value of \(\sqrt {50 - 7 \times \frac{{1\frac{2}{7} - 2\frac{3}{7}}}{{\frac{1}{{1 + \frac{3}{7}}} - \frac{9}{{70}}}}} \) is –1). 02). 43). 34). 8

Answer»

 

$(\sqrt {50 - 7 \times \frac{{1\frac{2}{7} - 2\frac{3}{7}}}{{\frac{1}{{1 + \frac{3}{7}}} - \frac{9}{{70}}}}} )$

 

= $(\sqrt {50 - 7 \times \frac{{\frac{9}{7} - \frac{{17}}{7}}}{{\frac{1}{{\frac{{10}}{7}}} - \frac{9}{{70}}}}} )$

= $(\sqrt {50 - 7 \times \frac{{ - \frac{8}{7}}}{{\frac{7}{{10}} - \frac{9}{{70}}}}} )$

= $(\sqrt {50 - 7 \times \frac{{ - \frac{8}{7}}}{{\frac{4}{7}}}} )$

= $(\sqrt {50 - 7 \times - 2} )$

= √64

= 8



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