-10x^2+x+4-161/40
=-10x^2+x-1/40
=-10(x^2-1/10x+1/400)
=-10(x-1/20)^2
最大值 x=1/20 時是0
所以-10x^2+x+4的最大值為161/40
用配方法證明-10x^2+x+4的最大值為161/40
用配方法證明-10x^2+x+4的最大值為161/40
數(shù)學(xué)人氣:555 ℃時間:2020-07-24 20:29:50
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