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If z=x-iy and z^frac{1}{3}= a+ib, then f...

If `z=x-iy` and `z^frac{1}{3}= a+ib`, then `frac{frac{x}{a}+frac{y}{b}}{a^2+b^2}= `

A

`-2`

B

`-1`

C

1

D

2

Text Solution

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