If y is an odd integer, which of the following must be an even integer ？（）
A: y+2
B: y+6
C: 2y-1
D: 3y
E: 3y+1
A: y+2
B: y+6
C: 2y-1
D: 3y
E: 3y+1
举一反三
- If x is an even integer and y is an odd integer, then which of the following is an even integer ？（） A: x2+y B: x2-y C: （x2）（y） D: x+y E: x-y
- 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
- 下面哪些定义是类型正确的？ A: f :: (Integer, Integer) - Floatf (x,y) =x / y B: f :: (Integer, Integer) - Floatf (x,y) = (fromInteger x) / (fromInteger y) C: f :: (Integer, Integer) - Floatf (x,y) = 3*x + y D: f :: (Integer, Integer) - Integerf (x, y) = 3*x + y
- 下面程序段中正确的是( )。 A: If x＜0 Then y=0 If x＜1 Then y=1 If x＜2 Then y=2 If x＞=2 Then y=3 B: If x＞=2 Then y=3 If x＞1 Then y=2 If x＞=0Then y=1 If x＞0 Then y=0 C: If x＜0 Then y=0 Else If＞=0Then y=1 Else y=3 End If D: If x＞=2 Then y=3 Else If＞=1 Then y=2 Else y=0 End If
- Consider the following sequence: x(n)={3,-6,5,-1,0,7,8}, -1≤n≤5.suppose the sequence y(n)=x(-n-2),then y(0)=______ , y(-2)=______ , y(-4)=______ , y(-6)=______ , y(2)=______ .