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已知函数f(x)=x2+ax﹣lnx,a∈R. (Ⅰ)当a=1时,求f(x)的单调区间; (Ⅱ)当函数f(x)在[1,2]上是减函数,求实数a的取值范围; (Ⅲ)令g(x)=f(x)﹣x2,是...
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高三上学期数学《》真题及答案
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已知函数fx=ax2-2a+1x+2lnxa∈R..1若曲线y=fx在x=1和x=3处的切线互相平行
已知函数fx=x2+ax﹣2lnxa∈R..1若a=1求函数fx的单调区间和极值2若函数fx在区间0
已知a∈R.函数fx=ex﹣1﹣ax的图象与x轴相切.Ⅰ求fx的单调区间Ⅱ当x>1时fx>mx﹣1l
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设函数fx=ax-2-lnxa∈R..Ⅰ若fx在点efe处的切线为x-ey+b=0求ab的值Ⅱ求fx
已知a∈R.函数fx=ex﹣1﹣ax的图象与x轴相切.Ⅰ求fx的单调区间Ⅱ当x>1时fx>mx﹣1l
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∃x∈R.,f(x)≤f(x
0
)
∃x∈R.,f(x)≥f(x
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∀x∈R.,f(x)≤f(x
0
)
∀x∈R.,f(x)≥f(x
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已知函数fx=x2+axa∈R.gx=lnx.1求证gx<2设hx=fx+bgxb∈R..①若a2+
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某实验室保存有野生型和一些突变型果蝇.果蝇的部分隐性突变基因及其在染色体上的位置如图所示.回答下列问题. 1同学甲用翅外展粗糙眼果蝇与野生型正常翅正常眼纯合子果蝇进行杂交F2中翅外展正常眼个体出现的概率为.图中所列基因中不能与翅外展基因进行自由组合的是. 2同学乙用焦刚毛白眼雄蝇与野生型直刚毛红眼纯合子雌蝇进行杂交正交则子代雄蝇中焦刚毛个体出现的概率为若进行反交子代中白眼个体出现的概率为. 3为了验证遗传规律同学丙让白眼黑檀体雄果蝇与野生型红眼灰体纯合子雌果蝇进行杂交得到F1F1相互交配得到F2.那么在所得实验结果中能够验证自由组合定律的F1表现型是F2表现型及其分离比是验证伴性遗传时应分析的相对性状是能够验证伴性遗传的F2表现型及其分离比是.
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