Toán Lớp 9: Tìm Max: A=sqrt(x+5)+sqrt(4-x)
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Toán Lớp 9: Tìm Max: A=sqrt(x+5)+sqrt(4-x)
Comments ( 1 )
Dấu bằng xảy ra khi 1/(\sqrt{x+5})=1/(\sqrt{4-x})
Tương đương x=-1/2