集合M={x|x2+2x-a=0},∅⊂≠M，则实数a的取值范围是( )_刷题宝

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集合M={x|x2+2x-a=0},∅⊂≠M，则实数a的取值范围是( )

A： $a \leq 1$

B： $a \geq 1$

C： $a \geq - 1$

D： $a \leq - 1$

上一题下一题 0.0难度选择题更新时间:2018-08-20 05:48:32

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C

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