求函数y=(x²+4)/根号(x²+3)的最小值.
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求函数y=(x²+4)/根号(x²+3)的最小值.
求函数y=(x²+4)/根号(x²+3)的最小值.
求函数y=(x²+4)/根号(x²+3)的最小值.
答案是2,如图
y=(x²+4)/(x²+3 )
=(x²+3 )/(x²+3 )+1/(x²+3 )
=(x²+3 )+1/(x²+3 )>=2
最小值为2