Cho x+y+z=1.Tìm min $P= x^{2}+y^{2}+4z^{2}-2x-4y+4z+1$
Tìm min $P= x^{2}+y^{2}+4z^{2}-2x-4y+4z+1$
Started By duyanh782014, 26-09-2016 - 16:31
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