的设计思路为( )[img=144x157]17a3d9c2f4ffab5.png[/img]
举一反三
- For what values of a and b will [img=746x216]1803474d8173a86.png[/img]be differentiable for all values of x? A: a=3/4, b=9/4 B: a=3/2, b=9/2 C: a=3/4, b=9/2 D: a=3/2, b=9/4
- 求不定积分[img=121x54]17da653839aa6ae.png[/img]; ( ) A: log(x^2 + 3*x + 25/4)/4 + (5*atan(x/2 + 3/4))/4 B: log(x^2 + 3*x + 25/4)/4 C: (5*atan(x/2 + 3/4))/4 D: log(x^2 + 3*x + 25/4)/4 - (5*atan(x/2 + 3/4))/4
- 函数[img=196x27]17de92706aff834.png[/img],已知f(x)在x=-3处取得极值,则 a等于( ) A: 2 B: 3 C: 4 D: 5
- 设[img=127x53]17f1b3d6db98b83.jpg[/img],f(x)=arctanΧ,则[img=56x55]17f1b3d82842941.jpg[/img]=()。 A: π B: 3π/4 C: -3π/4 D: 2π
- 设二维随机变量(X,Y) 的概率密度函数为[img=324x73]1803be452953729.jpg[/img], 则E(X)= . A: 1/2 B: 2/3 C: 3/4 D: 4/5