若曲面积分\(\int\!\!\!\int\limits_\sum {f(x,y,z)dS = 6} \),且\(\int\!\!\!\int\limits_\sum {G(x,y,z)dS = 3} \),则\(\int\!\!\!\int\limits_\sum {[f(x,y,z) + G(x,y,z)]dS = } \) 。 ______
举一反三
- 若曲面\(\sum\)为平面\(x = 0,y = 0,z = 0\)及平面\(x + y + z = 1\)所围成的四面体的整个边界曲面,则曲面积分\(\int\!\!\!\int\limits_\Sigma {xyzdS = {1 \over {40}}} \) 。
- 下列函数定义不正确的是 ( ) A: int max B: int x y,z; C: z=x>y x: y D: int max(x,y) E: int x,y; F: int z; G: z=x>y x:y; H: return(z) I: int max(x,y) J: int x,y z; K: z=x>y x: y; L: return(z); M: int max( )
- 程序代码如下:void sum(int x, int y);void main(){int a, b;scanf("%d,%d", a, b);sum(a, b);}void sum(int x, int y);{z = x + y;printf("%d", &z);}错误的原因:改正:
- 程序 int f1(int x, int y) {int z; z=(x>y)?x:y; return z; } int f2(int x, int y) {int z; z=(x 3,5,4
- 下列函数定义不正确的是( )。 A: int max() {int x,y,z; z=x>y?x:y; return z;} B: int max(x,y){ int z; z=x>y?x:y; return z;} C: int max(){ } D: int max(int x,int y) {int z; z=x>y?x:y; return(z);}