X/(x+6) <=0
___+____(-6)_____-_____[0]___+_____
Ответ: x e (-6; 0]
<span> x²−4,7x+7,7=0
х₁+х₂=4,7
х₁*х₂=7,7</span>
3*1/2+2*(-1)+3=1,5-2+3=2,5
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(x+1+1/4x):(x-1/4x)=[(4x²+4x+1)/4x]:[(4x²-1)/4x]=[(2x+1)²/4x] :[(2x+1)*(2x-1)/4x]=
=(2x+1)/(2x-1)
x=11,5
(2*11,5+1)/(2*11,5-1)=24/22=12/11