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解:(Ⅰ) fx=3x-6x,是函数y=ffx的极值点=-|||-12a-12= :1(Ⅱ)fx)=32-6xx∈03 下面分类讨论:①当时,因为f(x]=3ax2-650,易知T=fx在0,3上是减函数,所以x-|||-二0}=,分=4-2;②当时,因为f(x=3ax2-6=3x(a-2),令f(x)=3ax2-6=3x(a0-2=0得或三;令f(x)=3ax2-6=3x...
line 552, in AddModuleToCache dict = mod.CLSIDToClassMap AttributeError: module 'win32com.gen_py.00020905-0000-4B30-A977-D214852036FFx0x3x0' has no attribute 'CLSIDToClassMap'
(x^2)-1/x+3 f(x^2)=(x^2)^2-x^2+3=x^4-x^2+3 f(f(x))=f(x^2-x+3)=(x^2-x+3)^2-(x^2-x+3)+3 前两项提取x -x+3y=(x^2-x+3)(x^2-x+3-1)+3 =(x^2-x+3)(x^2-x+2)+3 =x^4-x^3+2x^2-x^3+x^2-2x+3x^2-3x+6+3 =x^4-2x^3+6x^2-...
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设f(x)=kx+b f(f(x))=k(kx+b)+b=k²x+kb+b=9x+25 比较系数得：k²=9, kb+b=25 解得：k=3, b=25/4, 或k=-3, b=-25/2 故f(x)=3x+25/4或f(x)=-3x-25/2
21.【答案】解:(1)因为对任意x∈R,f(x)=3(3x-2)-2=9x-8≠x所以fM因为对任意x∈-∞,0U0,+∞ggx=-=x所以gx∈M.(2)因为函数hx∈M,且hx=kx+ak≠1所以h(h(x)=k(kx+a)+a=x所以k2=1+a=,解得k=1,(舍去)或k=-1a=0a∈R所以h(x)=-x+a当x∈-∞,1时,h(∈[a-1,+∞),h01-,+...
用秦九韶算法求多项式ffx) = 0.5x5 + 4x4-3x2 + x- 1 当x = 3的值酎,先算的是( ) A. 3x3 = 9 B. 0o 5x35=121.5 C. 0.5x3+ 4 = 5.5 D. COo 5x3+ 4)x3 = 16.5 相关知识点: 试题来源: 解析 C 解析:按通推方法,队里到外先算0。5x + 4的值, 答案:C...
选彳4—5:不等式选讲:已知函数•,]|(I )若不等式ffx)三2的解集为|[0,4],求实数m的值;(H )在(I )的条件下,若3x E R,使得f(x口)+口M。+ 5)-m3 < 4m ,求实数 m的取值范围. 相关知识点: 试题来源: 解析 [答案](I ) 2; (II) a u (L +⑹.[答案]D[解析]试题分析:(I )根...
3x2.51/20.82.51.013.7232 3x4.01/20.84.01.115.7318 4核 4x1.51/20.71.51.012.9211 4x2.51/20.82.51.114.4294 4x4.01/20.84.01.217.4403 7核 7x1.51/20.70.51.115.5331 7x2.51/20.80.51.218.0698 12核 12x1.51/20.70.51.220.2537 12x2.51/20.80.51.424.21093 ...