Taking the value of a square root with positive real part only, the value of \( \sqrt{-3-4 i}+\s...

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Taking the value of a square root with positive real part only, the value of \( \sqrt{-3-4 i}+\sqrt{3+4 i} \) is
(a) \( 1+i \)
(b) \( 1-3 i \)
(c) \( 1+3 i \)
(d) none of these
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