| log ' ( x ) = 1x ⋅ ln ( 10 ) Bevis: y =log ( x ) 10y = x y ⋅ ln ( 10 ) = ln ( x ) y = ln ( x )ln ( 10 ) y = ln ( x ) ⋅ 1ln ( 10 ) y ' = 1x ⋅ 1ln ( 10 ) |
| log ' ( x ) = 1x ⋅ ln ( 10 ) Bevis: y =log ( x ) 10y = x y ⋅ ln ( 10 ) = ln ( x ) y = ln ( x )ln ( 10 ) y = ln ( x ) ⋅ 1ln ( 10 ) y ' = 1x ⋅ 1ln ( 10 ) |
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