Question

Rationalise the denominator of the following 1 by root7

Answer 1

Answer:

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Answer 2

Answer:

√7/7

Step-by-step explanation:

$\bf \underline{Solution-}$

Given expression

$\frac{1}{ \sqrt{7} }$

We know that rationalising factor of √a is √a. To rationalise the denominator of 1/√7, we multiply this by √7/√7.

$= \frac{1}{ \sqrt{7} } \times \frac{ \sqrt{7} }{ \sqrt{7} }$

$= \frac{1( \sqrt{7}) }{ \sqrt{7 \times 7} }$

$= \frac{ \sqrt{7} }{ \sqrt{7 \times 7} }$

$\bf= \frac{ \sqrt{7} }{7} \: ans.$