Решить неравенство: ·
9^x-4*3^x+3<=0<br>3^x=t t^2-4t+3<=0<br>D=16-12=4 x12=4+-2/2=1 3 (t-1)(t-3)<=0<br>============1=======3======= ++++++++++++ ----------- =+++++ t=[1 3] 3^x>=1 x>=0 3^x<=3<br>x<=1<br>x=[0 1]