Odpowiedź:
[tex]log_5 p = \frac{3}{4}[/tex]
a) [tex]log_5 ( 5 p^2) = log_5 5 + log_5 p^2 = 1 + 2log_5 p = 1 + 2*\frac{3}{4} = 1 +\frac{6}{4}= 2,5[/tex]
c) [tex]log_5 \frac{125}{p^9} = log_5 125 - log_5 p^9 = log_5 5^3 - 9*log_5 p = 3*1 - 9*\frac{3}{4} = 3 - \frac{27}{4} = 3 - 6,75 = - 3,75[/tex]
Szczegółowe wyjaśnienie:
zad 6
log₁₀1000 - log₀,₁100 = 3 - (- 2) = 3 + 2 = 5 > 0 c.n.u
zad 7
log₅p = 3/4
5³⁾⁴ = p
a)
log₅5p² = log₅(5 * 5³⁾⁴) = log₅5¹ ³⁾⁴ = 1 3/4 = 1,75
b)
log₅125/p⁹ = log₅5³/(5³⁾⁴)⁹ = log₅5³/5²⁷⁾⁴ = log₅5³⁻⁶ ³⁾⁴ =log₅5⁻³ ³⁾⁴ =
= - 3 3/4 = - 3,75
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Odpowiedź:
[tex]log_5 p = \frac{3}{4}[/tex]
a) [tex]log_5 ( 5 p^2) = log_5 5 + log_5 p^2 = 1 + 2log_5 p = 1 + 2*\frac{3}{4} = 1 +\frac{6}{4}= 2,5[/tex]
c) [tex]log_5 \frac{125}{p^9} = log_5 125 - log_5 p^9 = log_5 5^3 - 9*log_5 p = 3*1 - 9*\frac{3}{4} = 3 - \frac{27}{4} = 3 - 6,75 = - 3,75[/tex]
Szczegółowe wyjaśnienie:
Odpowiedź:
zad 6
log₁₀1000 - log₀,₁100 = 3 - (- 2) = 3 + 2 = 5 > 0 c.n.u
zad 7
log₅p = 3/4
5³⁾⁴ = p
a)
log₅5p² = log₅(5 * 5³⁾⁴) = log₅5¹ ³⁾⁴ = 1 3/4 = 1,75
b)
log₅125/p⁹ = log₅5³/(5³⁾⁴)⁹ = log₅5³/5²⁷⁾⁴ = log₅5³⁻⁶ ³⁾⁴ =log₅5⁻³ ³⁾⁴ =
= - 3 3/4 = - 3,75