Question

Rozwiąż: a) log5 + log(x+10) = 1 - log(2x-1) + log(21x-20)

Answer 1

log5+log(x+10)=1-log(21x-20)

log5+logx+log10=1-log21x-log20

log15+logx=1-log21x-log20

log35+logx=1-log21x

log35=1-log20x

log35+log20x=1

1=log35+log20x