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1/2m^2-1/2m怎么配方?求出最小值
题目详情
1/2m^2-1/2m怎么配方?求出最小值
▼优质解答
答案和解析
1/2m^2-1/2m
=1/2(m²-m)
=1/2(m²-m+1/4-1/4)
=1/2(m-1/2)²-1/8
所以
m=1/2时取最小值-1/8.
=1/2(m²-m)
=1/2(m²-m+1/4-1/4)
=1/2(m-1/2)²-1/8
所以
m=1/2时取最小值-1/8.
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