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If (log)e4-1. 3868 ,t h e n(log)e 4.01= ...

If `(log)_e4-1. 3868 ,t h e n(log)_e 4.01=` 1.3968 (b) 1.3898 (c) 1.3893 (d) none of these

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Let `f(x)=y=log_ex`
Then, `y+Deltay=log_e(x+Deltax) `
so,`Deltay=log_e(x+Deltax)−log_e x…..(i) `
Since,`Deltay=f′(x)Deltax`
...
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