Question

rezolvati va rog aceste enunturi, multumesc anticipat!​

Answer 1

1)

$\frac{nr \: caz \: favorabie}{nr \: caz \: posinbile}$

a)

$\frac{1}{6}$

b)

$\frac{4}{6} = \frac{2}{3}$

2)

a)

${3}^{2x - 1} = 81 \ \\ {3}^{2x - 1} = {3}^{4} \\ 2x - 1 = 4 \\ 2x = 4 + 1 \\ 2x = 5 \\ x = 5 \div 2 \\ x = \frac{5}{2}$

b) aici cred ca ai gresit ceva

${4}^{x} = 11$

c)

${25}^{x} - 4 \times {5}^{x} - 3 = 2 \\ {25}^{x} - {20}^{x} - 3 = {2} \\ {25}^{x} - {20}^{x} = 2 + 3 \\ {25}^{x} - {20}^{x} = 5 \\ {5}^{x } = {5}^{1} \\ x = 1$

Answer 2

Răspuns:

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