已知函数f(x)=loga(ax^2-x+1/2)(1)当a=3/8时,求函数f(x)的单调递减区间 (2)当0小于a小于1时,
已知函数f(x)=loga(ax^2-x+1/2)(1)当a=3/8时,求函数f(x)的单调递减区间 (2)当0小于a小于1时,
f(x)在1,2的闭区间上恒大于0,求实数a的取值范围
f(x)在1,2的闭区间上恒大于0,求实数a的取值范围
数学人气:411 ℃时间:2020-03-26 13:51:59
优质解答
(1)f(x) = log(a)[ax^2-x + 1/2 ]when a = 3/8f(x) = log(3/8)[3/8)x^2-x +1/2]letg(x) =(3/8)x^2-x +1/2g'(x) = (3/4)x -1 0=> (3/8)x^2-x +1/2 > 03x^2-8x +4 > 0(3x-2)(x-2) >0x>2 or x< 2/3ie x < 4/3 and (x>2 ...
我来回答
类似推荐
猜你喜欢
- 1Spring Festival 的文章
- 2文言文 、 辨析“而”字的意义和用法.
- 3用所给单词的正确形式填空:1.hainan is a very large island.it's the second[](large)island in china.
- 4若函数y=loga|x|(a>0,且a≠1)在区间(-∞,0)上是增函数,则a的取值范围是
- 5两位小数加三位小数,和最多是_位小数;两位小数乘三位小数,积最多是_位小数.
- 6英语翻译
- 7炼含杂质4%的生铁,需要含FE3O4的磁铁矿多少吨
- 8l studied english with him 求中文
- 9Can you tell me which English studying software is best And how much is it
- 10观察下列图形,他们是按一定规律排列的,依照此规律,第n个图形有多少个*?第100个图形中有多少?