Решить неравенства (1/9)^x-6*(1/3)^x-27<=0

Question

Решить неравенства (1/9)^x-6*(1/3)^x-27<=0<br>

Answer 1

(1/9)^x-(6/18)^x-27<=0;             6/18=1/3<br>(1/9)/(1/3)-27<=0;<br>(1/9)/(3/1)-27<=0;<br>3/9-27<=0;<br>1/3-27<=0;                            |:3<br>1-9<=0;  <br>-8<=0;  <br>
          [-8;0]
____________-8\\\\\\\\\\\0______>x
Ответ:[-8;0]