用标根法解不等式(1)2x²+x-6/(x-1)²(x+1)≤0 (2)-1≤3x/x²-4≤1
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用标根法解不等式(1)2x²+x-6/(x-1)²(x+1)≤0 (2)-1≤3x/x²-4≤1
用标根法解不等式(1)2x²+x-6/(x-1)²(x+1)≤0 (2)-1≤3x/x²-4≤1
用标根法解不等式(1)2x²+x-6/(x-1)²(x+1)≤0 (2)-1≤3x/x²-4≤1
《1》work out:分别令分子分母都为0
分母化简求解x1=3/2,x2=-2;
分子化简求解x3=1,x4=-1;
标根法可知相同的根不能过
所以解为[-2,-1)
《2》解答当-1≤3x/x²-4时解为x