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Mathematics, 02.03.2021 21:30 christib

Which of the following is a non-real complex number? A $\frac{5 - 2 \sqrt{7} }{4?}$
B.
c.
d.

$- 8 \sqrt{ \frac{1}{6} } - \frac{3}{\sqrt{2} }$
$9 - \frac{1}{\sqrt{17} }$
$3 \sqrt{ \frac{7}{5} } + \sqrt{ - \frac{9}{5} }$

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Which of the following is a non-real complex number? A
B.

c.

d.

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