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a
(logx)xlog(logx)+1logx
b
(logx)xlog(logx)−1logx
c
−(logx)xlog(logx)+1logx
d
−(logx)xlog(logx)−1logx
answer is A.
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Detailed Solution
y=(logx)xTake logarithm on both sideslogy=log(logx)xDifferentiate both sides 1ydydx=loglogx+x1logxddxlogx1ydydx=loglogx+x1logxddxlogx=loglogx+xlogx1x\ Therefore, dydx=ylog(logx)+1logx=(logx)xlog(logx)+1logx