Question

if x =7+4√3,then find the value of x+1/x
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Answer 1

Answer:

x=7+4√3

$\frac{1}{x} = \frac{1}{7 + 4 \sqrt{3} } \\ = \frac{7 - 4 \sqrt{3} }{49 - 48} \\ = 7 - 4 \sqrt{3}$

x+1/x=7+4√3+7-4√3

=14