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[" 23.If "(x+iy)^(1/3)=a+ib," then "(x)/...

[" 23.If "(x+iy)^(1/3)=a+ib," then "(x)/(a)+(y)/(b)" is equal to "],[[" (a) "4(a^(2)+b^(2))," (b) "4(a^(2)-b^(2))],[" (c) "4(b^(2)-a^(2))," (d) None of these "]]

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