Vector line equation of vector field [img=153x30]1803b7224204019.png[/img] passing through point M(1,2,3) ( )
A: [img=53x22]1803b72249c008c.png[/img]
B: [img=59x22]1803b722521410c.png[/img]
C: [img=166x29]1803b7226023f4c.png[/img]
D: [img=78x51]1803b7226872e38.png[/img]
A: [img=53x22]1803b72249c008c.png[/img]
B: [img=59x22]1803b722521410c.png[/img]
C: [img=166x29]1803b7226023f4c.png[/img]
D: [img=78x51]1803b7226872e38.png[/img]
举一反三
- The vector line equation of the vector field [img=408x30]1803b720e914a89.png[/img] is( ) A: [img=348x26]1803b720f3ee3da.png[/img] B: [img=304x26]1803b720fb4275c.png[/img] C: [img=304x48]1803b721069f000.png[/img] D: [img=275x48]1803b7210f9d574.png[/img]
- 1.设随机变量X的密度为[img=186x61]18034ea953ec9dd.png[/img]则常数A=________，概率[img=146x25]18034ea95d30d08.png[/img]__________. A: A=2，P(X>1|X<2)=[img=39x24]18034ea9659b618.png[/img] B: A=-2，P(X>1|X<2)=[img=39x24]18034ea9659b618.png[/img] C: A=2，P(X>1|X<2)=[img=47x44]18034ea9768a8c2.png[/img] D: A=-2，P(X>1|X<2)=[img=47x44]18034ea9768a8c2.png[/img]
- 1803b6a65bf4114.pngis a basis for a vector space V. [s[img=81x51]1803b6a6653a4f6.png[/img]. Which one is the vector x? A: [img=42x51]1803b6a66d43e0e.png[/img] B: [img=28x51]1803b6a6750b972.png[/img] C: [img=28x51]1803b6a67d4b84f.png[/img] D: [img=42x51]1803b6a685bca75.png[/img]
- Which of the following statements is wrong about curl? A: The curl of a vector field is a scalar and a function of the spatial coordinate points. B: At a certain point M in the field,[img=84x28]1803b721c59068a.png[/img] means that the vector line of this point is spinning. C: At a certain point M in the field,[img=84x26]1803b721cd97fe6.png[/img] means that the vector line of this point is spinless. D: Curl have the dimension of circumferential area density.
- 已知f(x)=x，g([img=17x17]1803ba6e9f63ed6.png[/img]，[img=17x17]1803ba6ea7375f0.png[/img]，[img=17x17]1803ba6eaef4fad.png[/img])=[img=17x17]1803ba6e9f63ed6.png[/img]*([img=17x17]1803ba6ea7375f0.png[/img] +1)， 其中x，[img=17x17]1803ba6e9f63ed6.png[/img]，[img=17x17]1803ba6ea7375f0.png[/img] ，[img=17x17]1803ba6eaef4fad.png[/img]均为自然数，新函数h可递归的构造如下：h(0,x) = f(x), 且h(S(n), x) = g(h(n,x),n,x)，请按递归式进行计算下列式子，不正确的是_____。 A: h(1，x) = x B: h(2，x) = 2x C: h(3，x) = 6x D: h(4，x) = 12x