Question

ex 3 cazul b) d) varog frumos

Answer 1

[tex]b) ( \frac{2}{3} )^x \cdot \frac{4}{9} = ( \frac{2}{3} )^7 \\ ( \frac{2}{3} )^x \cdot ( \frac{2}{3} )^2 = ( \frac{2}{3} )^7 \\ x+2 = 7 \\ x =5 \\ \\ d) ( \frac{9}{25} )^x : ( \frac{3}{5} )^y = ( \frac{3}{5} )^3 \\ \\ ( \frac{3}{5} )^{2x} : ( \frac{3}{5} )^y = ( \frac{3}{5} )^3 \\ \\ 2x - y =3 \\ \text { x si y pot lua orice valori ce respecta conditia de mai sus, de exemplu: } \\ \text{x = 2 si y = 1 sau x = 3 si y = 3 ...} [/tex]