if a,b belong to ]-1,2] the following equation holds true

[tex] log_{ \frac{2}{3} }( \frac{2 - a}{3} ) \times log_{ \frac{2}{3} }( \frac{1 + b}{3} ) = 1[/tex]
what if the minimal value that the following could have:

E=ab+a-2ab​

if ab belong to 12 the following equation holds true tex log frac23 frac2 a3 times log frac23 frac1 b3 1texwhat if the minimal value that the following could ha class=