双曲线x^2/16-y^2/9=1的渐近线方程为() A: y=±16x/9 B: y=±9x/16 C: x/3±y/4=0 D: x/4±y/3=0
双曲线x^2/16-y^2/9=1的渐近线方程为() A: y=±16x/9 B: y=±9x/16 C: x/3±y/4=0 D: x/4±y/3=0
以点\( (2, - 1,2) \)求球心,3为半径的球面方程为( ) A: \( {(x + 2)^2} + {(y - 1)^2} + {(z + 2)^2} = 9 \) B: \( {(x + 2)^2} + {(y - 1)^2} + {(z + 2)^2} = 3 \) C: \( {(x - 2)^2} + {(y + 1)^2} + {(z - 2)^2} = 9 \) D: \( {(x - 2)^2} + {(y + 1)^2} + {(z - 2)^2} = 3 \)
以点\( (2, - 1,2) \)求球心,3为半径的球面方程为( ) A: \( {(x + 2)^2} + {(y - 1)^2} + {(z + 2)^2} = 9 \) B: \( {(x + 2)^2} + {(y - 1)^2} + {(z + 2)^2} = 3 \) C: \( {(x - 2)^2} + {(y + 1)^2} + {(z - 2)^2} = 9 \) D: \( {(x - 2)^2} + {(y + 1)^2} + {(z - 2)^2} = 3 \)
下面程序运行后,y的值是( ) 。 Dim x%,y% x = Int(Rnd) + 3 If x ^ 2 = 9 Then y = x ^ 2 - 2 else y=1
下面程序运行后,y的值是( ) 。 Dim x%,y% x = Int(Rnd) + 3 If x ^ 2 = 9 Then y = x ^ 2 - 2 else y=1
以点\( (2, - 1,2) \) 为球心,3为半径的球面方程为( ) A: \( {\left( {x + 2} \right)^2} + {(y - 1)^2} + {(z + 2)^2} = 9 \) B: \( {\left( {x + 2} \right)^2} + {(y - 1)^2} + {(z + 2)^2} = 3 \) C: \( {\left( {x - 2} \right)^2} + {(y + 1)^2} + {(z - 2)^2} = 9 \) D: \( {\left( {x - 2} \right)^2} + {(y + 1)^2} + {(z - 2)^2} = 3 \)
以点\( (2, - 1,2) \) 为球心,3为半径的球面方程为( ) A: \( {\left( {x + 2} \right)^2} + {(y - 1)^2} + {(z + 2)^2} = 9 \) B: \( {\left( {x + 2} \right)^2} + {(y - 1)^2} + {(z + 2)^2} = 3 \) C: \( {\left( {x - 2} \right)^2} + {(y + 1)^2} + {(z - 2)^2} = 9 \) D: \( {\left( {x - 2} \right)^2} + {(y + 1)^2} + {(z - 2)^2} = 3 \)
已知点()(()-()1(),()y()1())(),()(2(),()y()2())(),()(()-()3(),()y()3())()都在函数()y()=()x()2()的图象上,则()()A.()y()1()<()y()2()<()y()3()B.()y()1()<()y()3()<()y()2()C.()y()3()<()y()2()<()y()1()D.()y()2()<()y()1()<()y()3
已知点()(()-()1(),()y()1())(),()(2(),()y()2())(),()(()-()3(),()y()3())()都在函数()y()=()x()2()的图象上,则()()A.()y()1()<()y()2()<()y()3()B.()y()1()<()y()3()<()y()2()C.()y()3()<()y()2()<()y()1()D.()y()2()<()y()1()<()y()3
2、3…9、1,2、2、3…9、2,数到1、2、3…9( ),就是100张
2、3…9、1,2、2、3…9、2,数到1、2、3…9( ),就是100张
设随机变量X与Y相互独立,均服从区间[0,3]上的均匀分布,则P(max{X,Y}≤1)=( )。 A: 1/3 B: 1/9 C: 2/3 D: 2/9
设随机变量X与Y相互独立,均服从区间[0,3]上的均匀分布,则P(max{X,Y}≤1)=( )。 A: 1/3 B: 1/9 C: 2/3 D: 2/9
已知点A(4,0,5)和点B(2,1,3),则向量AB的方向余弦( ) A: -2/3 1/3 -2/3 B: 2/3 -1/3 2/3 C: -2/9 1/9 2/9 D: 2/9 -1/9 2/9
已知点A(4,0,5)和点B(2,1,3),则向量AB的方向余弦( ) A: -2/3 1/3 -2/3 B: 2/3 -1/3 2/3 C: -2/9 1/9 2/9 D: 2/9 -1/9 2/9
执行下列程序段的结果是() int x=3,y=4; printf("x=%d,y=%d",3*x,2*y); A: 3,4 B: x=3,y=4 C: x=9,y=8 D: 9,8
执行下列程序段的结果是() int x=3,y=4; printf("x=%d,y=%d",3*x,2*y); A: 3,4 B: x=3,y=4 C: x=9,y=8 D: 9,8
Simplify the expression:$({\frac{3x^{3/2}y^3}{x^2y^{-1/2}})^{-2}}$Which answer is CORRECT? A: $9xy^7$ B: $\frac19 xy^{-7}$ C: $\frac19 x^{-1}y^7$ D: $9 x^{-1}y^7$
Simplify the expression:$({\frac{3x^{3/2}y^3}{x^2y^{-1/2}})^{-2}}$Which answer is CORRECT? A: $9xy^7$ B: $\frac19 xy^{-7}$ C: $\frac19 x^{-1}y^7$ D: $9 x^{-1}y^7$