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Question

If (x+iy)5=p+iq, then prove that (y+ix)5=q+ip.

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Solution

(x+iy)5=p+iq
or ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯(x+iy)5=¯¯¯¯¯¯¯¯¯¯¯¯¯¯p+iq
or ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯(x+iy)5=piq
or (xiy)5=piq
or i5(xiy)5=pi5i6q
or (xii2y)5=pi+q
or (y+ix)5=pi+q
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