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(9/2)^x×(5/9)x=(5/2)^3 x=?

Răspuns :

[tex](\frac{9}{2})^x*(\frac{5}{9})^x=(\frac{5}{2})^3[/tex]

[tex]\frac{9^x*5^x}{2^x*9^x}=(\frac{5}{2})^3[/tex]

[tex]\frac{5^x}{2^x}=(\frac{5}{2})^3[/tex]

[tex](\frac{5}{2})^x=(\frac{5}{2})^3[/tex]

[tex]x=3[/tex]