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10 questions
log12 12=\log_{\frac{1}{2}}\ \frac{1}{2}=log21 21=
3
2
1
0
log51=\log_51=log51=
5
log133\log_{\frac{1}{3}}3log313 =
-1
9
log4(4)5\log_4\left(4\right)^5log4(4)5
16
4
2log272^{\log_27}2log27 =
49
7
Cho
loga (b1.b2)=loga b1.loga b2\log_a\ \left(b_1.b_2\right)=\log_a\ b_1.\log_a\ b_2loga (b1.b2)=loga b1.loga b2
loga (b1.b2)=loga b1+loga b2\log_a\ \left(b_1.b_2\right)=\log_a\ b_1+\log_a\ b_2loga (b1.b2)=loga b1+loga b2
loga (b1.b2)=loga b1−loga b2\log_a\ \left(b_1.b_2\right)=\log_a\ b_1-\log_a\ b_2loga (b1.b2)=loga b1−loga b2
loga (b1.b2)=loga (b1+ b2)\log_a\ \left(b_1.b_2\right)=\log_a\ \left(b_1+\ b_2\right)loga (b1.b2)=loga (b1+ b2)
log5125=\log_5125=log5125=
125
25
log327−log381=\log_327-\log_381=log327−log381=
13\frac{1}{3}31
log2(16)13=\log_2\left(16\right)^{\frac{1}{3}}=log2(16)31=
34\frac{3}{4}43
43\frac{4}{3}34
log28=\log_2\sqrt{8}=log28=
32\frac{3}{2}23
23\frac{2}{3}32
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