Question

If a = 1 + √7 then the value of - 6 / a is______ *​

Answer 1

Step-by-step explanation:

$a = 1 + \sqrt{7} \\ \frac{1}{a} = \frac{1}{1 + \sqrt{7} } \times \frac{1 - \sqrt{7} }{1 - \sqrt{7} } \\ = \frac{1 - \sqrt{7} }{ - 6}$

We have to find -6×1/a

$- 6 \times \frac{1 - \sqrt{7} }{ - 6} \\ 1 - \sqrt{7}$

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