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Solve 4^(log(2)logx)=logx-(logx)^(2)+1 (...

Solve `4^(log_(2)logx)=logx-(logx)^(2)+1` (base is e).

Text Solution

Verified by Experts

`log_(2)` log x is meaningful if `xgt1`.
Since `4^(log_(2)logx)=2^(2log_(2)logx=(2^(log_(2)logx))^(2)`
`=(logx)^(2)(a^(log)a^(x)=x,agt0,a!=1)`
So the given equation reduces to `2(logx)^(2)-logx-1=0`.
Therefore, log x=1 or log `x=-1//2`. But `xgt1,log `xgt0`.
Hence, log x=1, i.e,x=e.
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