若m≥0,满足3√m +5丨n丨=7,x=2√m -3丨n丨,试求x的取值范围,我算出来是x≥4.2.可是查百度又错了,看不懂百度搜索的答案步骤,

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若m≥0,满足3√m +5丨n丨=7,x=2√m -3丨n丨,试求x的取值范围,我算出来是x≥4.2.可是查百度又错了,看不懂百度搜索的答案步骤,
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若m≥0,满足3√m +5丨n丨=7,x=2√m -3丨n丨,试求x的取值范围,我算出来是x≥4.2.可是查百度又错了,看不懂百度搜索的答案步骤,
若m≥0,满足3√m +5丨n丨=7,x=2√m -3丨n丨,试求x的取值范围
,我算出来是x≥4.2.可是查百度又错了,看不懂百度搜索的答案步骤,

若m≥0,满足3√m +5丨n丨=7,x=2√m -3丨n丨,试求x的取值范围,我算出来是x≥4.2.可是查百度又错了,看不懂百度搜索的答案步骤,