解不等式(x^2+x-2)/(x^3+7x^2-8x)>=0是这个:解不等式(x^2+x-2)/(x^3+7x^2-8x)>=9
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解不等式(x^2+x-2)/(x^3+7x^2-8x)>=0是这个:解不等式(x^2+x-2)/(x^3+7x^2-8x)>=9
解不等式(x^2+x-2)/(x^3+7x^2-8x)>=0
是这个:解不等式(x^2+x-2)/(x^3+7x^2-8x)>=9
解不等式(x^2+x-2)/(x^3+7x^2-8x)>=0是这个:解不等式(x^2+x-2)/(x^3+7x^2-8x)>=9
honest错在不能随便乘以x(x-1)(x+8),不知道符号的,负数的话,不等号要变向.
判断哪个区间就是先看x->+∞,是正的,然后交错区间,注意x≠-8,0,1