Log3 81=4log5 1=0log2 64=6log5 625=4log5 0,04= -2log7 2401=4lg0,001=-3log3...

1) log₃81 = 4
3⁴ = 81
81 = 81
2) log₅1 = 0
5° = 1
1=1
3) log₂64 = 6
2⁶ = 64
64 = 64
4) log₅625 = 4
5⁴ = 625
625 = 625
5) log₅0.04 = -2
5⁻² = $\frac{1}{ 5^{2} } = \frac{1}{25} =0.04$
0.04=0.04
6) log₇2401 = 4
7⁴ = 2401
2401 = 2401
7) lg 0.001 = -3
10⁻³ = $\frac{1}{ 10^{3} } = \frac{1}{1000} =0.001$
0.001=0.001
8) log₃243 = 5
3⁵ = 243
243 = 243
9) lg 0.1 = -1
10⁻¹ = $\frac{1}{10}=0.1$
0.1 = 0.1
10) log₀.₂ 0.008 = 3
(0.2)³ = 0.008
0.008 = 0.008
11) log₀.₃ 0.09 = 2
(0.3)² = 0.09
0.09 = 0.09
12) lg 10³ = 3
10³ = 10³