Question

Cine imi stii sa imi rezolve aceste intrebari ?
Da , sa fie sigur!!!!

Answer 1

1. $3^{2}* 9^{3} * 27^{0.3}= 3^{2}*( 3^{2}) ^{3}*( 3^{3})^{0.3}=3^{2}*3^{6}*3^{0.9}=3^{8.9}=3 ^{ \frac{89}{10} } =$$\sqrt[10]{3 ^{89} }= \sqrt[10]{3 ^{80}*3 ^{9} }= \sqrt[10]{3 ^{80}} \sqrt[10]{3 ^{9}}= 3^{8}* \sqrt[10]{3 ^{9} }= 6561 \sqrt[10]{19683}$

3.  $8 ^{3x+4} \geq 4 ^{2x-3}$
$2 ^{9x+12} \geq 2 ^{4x-6}$
$9x+12 \geq 4x-6$
$9x-4x \geq -6-12$
$5x \geq -18$
$5x:5 \geq -18:5$
$x \geq -\frac{18}{5}$