不定积分[f′(x)/(1+[f(x)]2)]dx等于() A: ln|1+f(x)|f+c B: (1/2)1n|1+f2(x)|+c C: arctanf(x)+c D: (1/2)arctanf(x)+c
不定积分[f′(x)/(1+[f(x)]2)]dx等于() A: ln|1+f(x)|f+c B: (1/2)1n|1+f2(x)|+c C: arctanf(x)+c D: (1/2)arctanf(x)+c
【单选题】对任意实数x 1 , y 1 , x 2 , y 2 , x 1 < x 2 , y 1 < y 2 , 分布函数P{x 1 <X≤x 2 , y 1 <Y≤y 2 }=? A. F(x 2 , y 2 )+ F(x 1 , y 1 )+ F(x 1 , y 2 )+ F(x 2 , y 1 ) B. F(x 2 , y 2 )- F(x 1 , y 1 )+ F(x 1 , y 2 )- F(x 2 , y 1 ) C. F(x 2 , y 2 )+ F(x 1 , y 1 )- F(x 1 , y 2 )- F(x 2 , y 1 ) D. F(x 2 , y 2 )- F(x 1 , y 1 )- F(x 1 , y 2 )+ F(x 2 , y 1 )
【单选题】对任意实数x 1 , y 1 , x 2 , y 2 , x 1 < x 2 , y 1 < y 2 , 分布函数P{x 1 <X≤x 2 , y 1 <Y≤y 2 }=? A. F(x 2 , y 2 )+ F(x 1 , y 1 )+ F(x 1 , y 2 )+ F(x 2 , y 1 ) B. F(x 2 , y 2 )- F(x 1 , y 1 )+ F(x 1 , y 2 )- F(x 2 , y 1 ) C. F(x 2 , y 2 )+ F(x 1 , y 1 )- F(x 1 , y 2 )- F(x 2 , y 1 ) D. F(x 2 , y 2 )- F(x 1 , y 1 )- F(x 1 , y 2 )+ F(x 2 , y 1 )
【多选题】若f 1 (t) = ɛ (-t) , f 2 (t) = e t ,则f 1 (t)* f 2 (t) = A. f 1 ꞌ (t)* f 2 (–1) (t) B. f 1 (–1) (t)* f 2 ꞌ (t) C. f 1 (t-3)* f 2 (t+3) D. f 1 (–3) (t)* f 2 ꞌꞌꞌ (t)
【多选题】若f 1 (t) = ɛ (-t) , f 2 (t) = e t ,则f 1 (t)* f 2 (t) = A. f 1 ꞌ (t)* f 2 (–1) (t) B. f 1 (–1) (t)* f 2 ꞌ (t) C. f 1 (t-3)* f 2 (t+3) D. f 1 (–3) (t)* f 2 ꞌꞌꞌ (t)
f(x)=x2+bx+c,x∈R,有f(2+x)=f(2-x),则( ) A: f(1)<f(2)<f(4) B: f(2)<f(4)<f(1) C: f(4)<f(2)<f(1) D: f(2)<f(1)<f(4) E: f(1)<f(4)<f(2)
f(x)=x2+bx+c,x∈R,有f(2+x)=f(2-x),则( ) A: f(1)<f(2)<f(4) B: f(2)<f(4)<f(1) C: f(4)<f(2)<f(1) D: f(2)<f(1)<f(4) E: f(1)<f(4)<f(2)
设个体域D={1,2}与公式∀x F(x)等价的命题公式是( ) A: F(1)∧F(2) B: F(1)→F(2) C: F(1)∨F(2) D: F(2)→F(1)
设个体域D={1,2}与公式∀x F(x)等价的命题公式是( ) A: F(1)∧F(2) B: F(1)→F(2) C: F(1)∨F(2) D: F(2)→F(1)
设f(x)为连续函数,则等于() A: f(2)-f(0) B: 1/2[f(11)-f(0)] C: 1/2[f(2)-f(0)] D: f(1)-f(0)
设f(x)为连续函数,则等于() A: f(2)-f(0) B: 1/2[f(11)-f(0)] C: 1/2[f(2)-f(0)] D: f(1)-f(0)
设函数f(x)在区间[-2,2]上可导,且f′(x)>f(x)>0,则()。 A: f(-2)/f(-1)>1 B: f(0)/f(-1)>e C: f(1)/f(-1)<e<sup>2</sup> D: f(2)/f(-1)<e<sup>2</sup>
设函数f(x)在区间[-2,2]上可导,且f′(x)>f(x)>0,则()。 A: f(-2)/f(-1)>1 B: f(0)/f(-1)>e C: f(1)/f(-1)<e<sup>2</sup> D: f(2)/f(-1)<e<sup>2</sup>
设函数f(x)=a|x|(a>0),且f(2)=4,则( ) A: f(-1)>f(-2) B: f(1)>f(2) C: f(2)<f(-2) D: f(-3)>f(-2)
设函数f(x)=a|x|(a>0),且f(2)=4,则( ) A: f(-1)>f(-2) B: f(1)>f(2) C: f(2)<f(-2) D: f(-3)>f(-2)
已知f(x)= ax+b,且f(-1)=2,f(1)=-2,则f(x)=( )
已知f(x)= ax+b,且f(-1)=2,f(1)=-2,则f(x)=( )
17e0b849b7d64bd.jpg,计算[img=19x34]17e0ab14a855463.jpg[/img]实验命令为(). A: syms x;f=diff(asinsqrt(x))f=1/2/x^(1/2)/(1-x)^(1/2) B: f=diff(asin(sqrt(x)))f=1/2/x^(1/2)/(1-x)^(1/2) C: syms x;diff(asin(sqrt(x)))f=1/2/x^(1/2)/(1-x)^(1/2)
17e0b849b7d64bd.jpg,计算[img=19x34]17e0ab14a855463.jpg[/img]实验命令为(). A: syms x;f=diff(asinsqrt(x))f=1/2/x^(1/2)/(1-x)^(1/2) B: f=diff(asin(sqrt(x)))f=1/2/x^(1/2)/(1-x)^(1/2) C: syms x;diff(asin(sqrt(x)))f=1/2/x^(1/2)/(1-x)^(1/2)