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Prove the following: \text { a) }(3+j 4)^{\frac{-1}{2}}+(3-j 4)^{\frac{-1}{2}}=\frac{4}{5} \text { b) } \sqrt{j}+\sqrt{-j}=\sqrt{2} \sqrt{\sqrt{\square}} \sqrt{\sqrt{\square}} \text { c) }(a+j b)^{\frac{1}{2}}=x+j y^{\prime} \text { then show that }(a-j b)^{\frac{1}{2}}=x-j y

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