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Resolución de logaritmos

log216=x 2x=16 x=4
log2x=5 xlog2=log5
xlog2=log5 x=log5/log2

logx+log2-log(x+2)=0
log(2x)-log(x+2)=0
log(2x/x+2)=log1
2x/x+2=1 2x=x+2 x=2