设在\(L\)上\(f(x,y) \le g(x,y)\),则\(\int_L {f(x,y)} ds\) \(\int_L {g(x,y)} ds\)(填大于,小于,大于等于,小于等于). ______
举一反三
- 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\(\int\!\!\!\int\limits_\sum {[f(x,y,z) + G(x,y,z)]dS = } \) 。 ______
- 如果在D上,\(f(x,y) \le g(x,y)\)那么\(\int\!\!\!\int\limits_D {f(x,y)d\sigma } \ge \int\!\!\!\int\limits_D {g(x,y)d\sigma } \)
- 在谓词公式("x)(F(x)ÞG(y))Þ($y)(H(x)∧L(x,y,z))中,("x)的辖域是() A: (F(x)ÞG(y)) B: F(x) C: (F(x)ÞG(y))Þ($y)(H(x)∧L(x,y,z)) D: ("x)(F(x)
- 在谓词公式("x)(F(x)ÞG(y))Þ($y)(H(x)∧L(x, y, z))中,("x)的辖域是( ) A: (F(x)ÞG(y)) B: F(x) C: (F(x)ÞG(y))Þ($y)(H(x)∧L(x, y, z)) D: ("x)(F(x)
- 在谓词公式("x)(F(x)ÞG(y))Þ($y)(H(x)∧L(x, y, z))中,($y)的辖域是( ) A: F(x) B: ("x)(F(x) C: (H(x)∧L(x, y, z)) D: (F(x)ÞG(y))