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Important Formulae of Logarithms

log(xy) = log x + log y
log\frac { x }{ y }  = log x - log y
log{ x }^{ n } = nlog x
\log _{ y }{ x=\frac { logx }{ logy }  }
\log _{ x }{ x } =1
\log _{ x }{{ x }^{ n } } = n
{ x }^{ \log _{ x }{n}}= n


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