Question

if a+1/a=17/4,find the value of (a-1/a)

Answer 1

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Solution:

$= > \frac{a + 1}{a} = \frac{17}{4} \\ \\ = > 17a = 4a + 4 \\ \\ = > a = \frac{4}{13} \\ \\ = > \frac{a - 1}{a} = \frac{ \frac{4}{13} - 1 }{ \frac{1}{13} } \\ \\ = > \frac{ \frac{ - 9}{13} }{ \frac{1}{13} } = - 9$
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