If xy = yx, then xyxy, is equal to:
Explanation:
We need to given answer in terms of x, hence let us find value of y in terms of x.
Given, xy = yx ⇒ y = (xy)1/x = xy/x
Now, xyxy = xxy/xxy
= x1-x/yxy
= xx/y-1
Hence, option (b).
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