1) (1/4)^x=(1/5)^x 2)0,3^6x-1-0,3^6x больше =0,7 Помогите решить ))))

[latex]\displaystyle \frac{1}{4}^x= \frac{1}{5}^x [/latex] т.к. 1/4≠1/5 то х=0 [latex]\displaystyle 11^{-7x+1} \leq 121^{-2x-10} 11^{-7x+1} \leq 11^{-4x-20} -7x+1 \leq -4x-20 -3x \leq -21 x \geq 7[/latex] [latex]\displaystyle 0.09^{5x-1}\ \textless \ 0.3{x+7} 0.03^{10x-2}\ \textless \ 0.3^{x+7} [/latex] [latex]\displaystyle 10x-2\ \textgreater \ x+7 [/latex] [latex]\displaystyle 9x\ \textgreater \ 9[/latex] [latex]\displaystyle x\ \textgreater \ 1[/latex] [latex]\displaystyle 0,3^{6x-1}-0.3^{6x} \geq 0.7 0.3^{6x}(1/0.3-1) \geq 0.7 0.3^{6x}(0.7/0.3) \geq 0.7 0.3^{6x} \geq 0.3 6x \leq 1 x \leq 1/6[/latex]