点M(-2, -4, 3)到平面[img=146x22]180319fd4f9e10c.png[/img]的离差是
举一反三
- 点[img=55x25]18031b8fcd87eef.png[/img]到平面[img=146x22]18031b8fd69aa98.png[/img]的距离为 A: 1 B: 2 C: 3 D: 4
- 点M(-2, 4, 3)与平面2x-y+2z+3=0间的离差是
- 已知三次函数f(x)=(1/3)[img=18x22]1802e2b148262dd.png[/img]-(4m-1)[img=18x22]1802e2b1512ca3b.png[/img]+(15[img=23x22]1802e2b159732bb.png[/img]-2m-7)x+2在x∈(-∞,+∞)是增函数,则m的取值范围是(). A: m<2或m>4 B: -4<m<-2 C: 2<m<4 D: m>4
- 已知三次函数f(x)=(1/3)[img=18x22]1802e2afaa1406d.png[/img]-(4m-1)[img=18x22]1802e2afb285c5b.png[/img]+(15[img=23x22]1802e2afbc0300d.png[/img]-2m-7)x+2在x∈(-∞,+∞)是增函数,则m的取值范围是(). A: m<2或m>4 B: -4<m<-2 C: 2<m<4 D: 以上都不对
- 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