解
簡約 −(149)log10(149)−(145)log10(145)
解
−14log10(14143125)+18log10(3)
+1
十進法表記
0.28305…解答ステップ
−(149)log10(149)−(145)log10(145)
規則を適用する: (a)=a(149)=149=−149log10(149)−145log10(145)
−149log10(149)=−log10((149)149)
−145log10(145)=−log10((145)145)
=−log10((149)149)−log10((145)145)
対数の規則を適用する: loga(x)+loga(y)=loga(xy)−log10((145)145)−log10((149)149)=log10((145)145(149)149)=−log10((145)145(149)149)
(145)145(149)149=14537824312514149379
=−log10(14537824312514149379)
対数の規則を適用する: loga(xy)=loga(x)+loga(y)log10(14537824312514149379)=log10(145378243125)+log10(14149379)=−(log10(145378243125)+log10(14149379))
log10(14149379)=79log10(3)−149log10(14)
=−(log10(145378243125)+(79log10(3)−149log10(14)))
規則を適用する: a+(b+c)=a+b+clog10(145378243125)+(79log10(3)−149log10(14))=log10(145378243125)+79log10(3)−149log10(14)=−(log10(145378243125)+79log10(3)−149log10(14))
log10(145378243125)+79log10(3)−149log10(14)=141log10(5378243125)+79log10(3)−149log10(14)
=−(141log10(5378243125)+79log10(3)−149log10(14))
141log10(5378243125)+79log10(3)−149log10(14)=14log10(5378243125)+18log10(3)−9log10(14)
=−14log10(5378243125)+18log10(3)−9log10(14)
log10(5378243125)+18log10(3)−9log10(14)=5log10(5)−14log10(14)+18log10(3)
=−145log10(5)−14log10(14)+18log10(3)
5log10(5)−14log10(14)+18log10(3)=log10(14143125)+18log10(3)
=−14log10(14143125)+18log10(3)