y=x^3+4x^2+(16/3)x+6
y'=3x^2+8x+16/3
=3(x^2+8x/3+16/9)
=2(x+4/3)^2
≥0
故有一個(gè)拐點(diǎn)x=-4/3
但在R上是單增函數(shù)那他有極點(diǎn)嗎哪有極點(diǎn)呀?沒有?難道有嗎?
x^3+4x^2+(16/3)x+6有最值嗎
x^3+4x^2+(16/3)x+6有最值嗎
用導(dǎo)數(shù)證明
用導(dǎo)數(shù)證明
其他人氣:779 ℃時(shí)間:2020-06-20 17:48:04
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