22 lines
No EOL
481 B
Markdown
22 lines
No EOL
481 B
Markdown
# Pagina 781
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## Esercizio 125
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$$ log_2 3 + log_2 6 = log_2 18 $$
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## Esercizio 127
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$$log(3*4)=log 12$$
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## Esercizio 129
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$$
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log 100 = 2
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$$
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## Eserizio 131
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$$log \frac{1}{100} =-2$$
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## Esercizio 133
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$$ log(400/25/2) = log(8) $$
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# Pagina 782
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## Esercizio 159
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$$ log_a(x^2 - x) = log_a(x^2-x) \to x^2-x > 0 \to x_{1,2,}=\frac{1\pm1}{2} \to x>1 $$
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# Pagina 785
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## Esercizio 234
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$$ln_e (-x)= -2 \to -x=e^{-2} \to x=-\frac{1}{e}$$
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## Esercizio 236
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$$ 3 log(x) + 6 = 0 \to log(x^3) = -6 $$ |