log a c+log b c=0(c≠1),则ab+c-abc=?

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log a c+log b c=0(c≠1),则ab+c-abc=?

log a c+log b c=0(c≠1),则ab+c-abc=?
log a c+log b c=0(c≠1),则ab+c-abc=?

log a c+log b c=0(c≠1),则ab+c-abc=?
log a c=(ln c)/(ln a),log b c=(ln c)/(ln b),且ln c≠0
得ln a=-ln b,ln(ab)=0,ab=1,ab+c-abc=0

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