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If y = loga x + log xa + log x x + logaa...

If `y = log_a x + log _xa + log _x x + log_aa`, then`dy/dx` is equal to

A

`(1)/(x)+xloga`

B

`(loga)/(x)+(x)/(loga)`

C

`(1)/(xloga)+xloga`

D

`(1)/(xloga)-(loga)/(x(logx)^(2))`

Text Solution

Verified by Experts

The correct Answer is:
D

Given, `y=log_(a)x+log_(x)a+log_(x)x+log_(a)a`
`=log_(a)x+(loga)/(log_(e)x)+1+1`
`therefore(dy)/(dx)=(1)/(x)log_(a)e-(loga)/(x(logx)^(2))*(1)/(x)`
`=(1)/(xloga)-(loga)/(x(logx)^(2))`
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