定義在R上的函數(shù)f(x)=x2(ax-3),其中a為常數(shù).若函數(shù)f(x)在區(qū)間(-1,0)上是增函數(shù),則 a的取值范圍是_.
定義在R上的函數(shù)f(x)=x2(ax-3),其中a為常數(shù).若函數(shù)f(x)在區(qū)間(-1,0)上是增函數(shù),則 a的取值范圍是______.
數(shù)學(xué)人氣:579 ℃時(shí)間:2020-05-25 14:57:37
優(yōu)質(zhì)解答
①當(dāng)a=0時(shí)f(x)=-3x2在區(qū)間(-1,0)上是增函數(shù)∴a=0符合題意;②當(dāng)a≠0時(shí),f'(x)=3ax (x-2a),令f'(x)=0得:x1=0,x2=2a當(dāng)a>0時(shí),對(duì)任意x∈(-1,0),f'(x)>0,∴a>0 (符合題意)當(dāng)a<0時(shí),當(dāng) x∈(2a,...
我來(lái)回答
類似推薦
- 定義在R上的函數(shù)f(x)=x2(ax-3),其中a為常數(shù).若函數(shù)f(x)在區(qū)間(-1,0)上是增函數(shù),則 a的取值范圍是_.
- 導(dǎo)數(shù),有追加
- √{(X+1)(X+2)/(X+3)(X+4)}
- 函數(shù)導(dǎo)數(shù)問(wèn)題 幫忙追加 只限今天
- 1.函數(shù)f(x)=(x-3)e^x的在x=2處的導(dǎo)數(shù)值為多少?
- 函數(shù)f(x)=sinx-cosx^2的最小值是?
- 英語(yǔ)翻譯
- I took my grandpa to the hospital this morning,_____ I missed the first class.
- So crazy
- 方差是各個(gè)數(shù)據(jù)與平均數(shù)之差的平方的平均數(shù)
- 函數(shù)y=f(x)與它反函數(shù)y=f^-1(x)怎么讀?
- These are photos of my families.Look at them 改錯(cuò)
猜你喜歡
- 1平面與平面重合,是否屬于平行一類?那重合的兩直線,也屬于平行一類的嗎?
- 2非洲每年因饑餓死亡的人數(shù)及現(xiàn)在饑餓人口數(shù)量拜托各位了 3Q
- 3decide to do sth.還=什么
- 4(7/8)o you think of london?B:5.____london is one of the liveliest cities
- 5啤酒可以托運(yùn)嗎
- 6邊長(zhǎng)為2√6的等邊三角形的中心到一邊的距離為?
- 7please give your hand to help me
- 8已知2的X次方等于3的Y次方等于6的Z次方不等等于1,證明X分之一加Y分之一等于Z分之一.
- 9幫我做做?
- 10機(jī)械分析天平TG628A的使用說(shuō)明書
- 11in winter ,we wear warm coats to protect our bodies_.
- 12( )was most importance to her ,she told me,was her family it this what as