3m(2m^2+n)/nm(2m+n)=3(2m^2+n)/n(2m+n)
![(\frac{2}{13})^{x^{2}-1} \geq1\\\\(\frac{2}{13} )^{x^{2}-1} \geq( \frac{2}{13}) ^{o}\\\\x^{2}-1 \leq0\\\\(x-1)(x+1)\leq0](https://tex.z-dn.net/?f=%28%5Cfrac%7B2%7D%7B13%7D%29%5E%7Bx%5E%7B2%7D-1%7D%20%5Cgeq1%5C%5C%5C%5C%28%5Cfrac%7B2%7D%7B13%7D%20%29%5E%7Bx%5E%7B2%7D-1%7D%20%5Cgeq%28%20%5Cfrac%7B2%7D%7B13%7D%29%20%5E%7Bo%7D%5C%5C%5C%5Cx%5E%7B2%7D-1%20%5Cleq0%5C%5C%5C%5C%28x-1%29%28x%2B1%29%5Cleq0)
+ - +
_______[- 1 ]_________[ 1 ]____________
x ∈ [ - 1 ; 1 ]
5x²-6+1=5x²-5=5(x²-1)=5(x-1)(x+1).
Log 7^-1(x+10)+log√7/7(x+4)+2>0
-log7(x+10)+log7^-1/2(x+4)+2>0
-log7(x+10)-2log7(x+4)+2>0
{x+10>0, x>-10
x+4>0, x>-4
ответ:(-4;+∞)