Question

Помогите пожалуйста !!!

Answer 1

1) 
$displaystyle frac{ sqrt[6]{a^3 sqrt{a}}}{a^{1/4}}= frac{ sqrt[6]{a^3*a^{1/2}}}{a^{1/4}}= frac{ sqrt[6]{a^{3+1/2}}}{a^{1/4}}= frac{ sqrt[6]{a^{7/2}}}{a^{1/4}}=\\= frac{a^{7/2*1/6}}{a^{1/4}}= a^{7/12-1/4}=a^{4/12}= sqrt[3]{a}$

2) 
$displaystyle 8^{log_23+1}=8^{log_23}*8=8*2^{3*log_23}=8*2^{log_23^3}=8*3^3=216$

3) 
$displaystyle left { {{2x-3y=-3} atop {x+3y=-6}} right.\\ left { {{2x-3y=-3} atop {2x-3y+x+3y=-3+(-6)}} right.\\ left { {{2x-3y=-3} atop {3x=-9}} right.\\ left { {{2x-3y=-3} atop {x=-3}} right.\\ left { {{2*(-3)-3y=-3} atop {x=-3}} right.\\ left { {{y=-1} atop {x=-3}} right.$