Question

Answer 1

\(1,đk\\ 3x-2\ge0\\ x\ge\dfrac{2}{3}\\ 2,-5+\dfrac{5}{3}x\ge0\\ x\ge3\\ 3,14-7x\ge0\\ 7x\le14\\ x\le2\\ 4,-5x-10\ge0\\ -5x\ge10\\ x\le-2\\ 5,x+1\ge0\\ x\ge-1\\ 6,\left\{{}\begin{matrix}x+3\ne0\\x-1\ge0\end{matrix}\right.=>\left\{{}\begin{matrix}x\ne-3\\x\ge1\end{matrix}\right.\\ 7,9x^2-6x+1\ge0\\ \left(3x-1\right)^2\ge0\left(lđ\right)=>\forall x\\ 8,-\left(x-1\right)^2\ge0\left(voli\right)\\ =>x\in\varnothing\\ 9,\left\{{}\begin{matrix}2x-1\ge0\\-x\ge0\end{matrix}\right.=>\left\{{}\begin{matrix}x\ge\dfrac{1}{2}\\x\le0\end{matrix}\right.\\ 10,\dfrac{4}{2x+3}\ge0\\ 2x+3>0\\ x>-\dfrac{3}{2}\)