网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
单选题
Let @ represent one of the four basic arithmetic operations such that, for any nonzero real numbers P and Q, P @ 0=P and P @ Q=Q @ P. Which arithmetic operation(S) does the symbol @ represent?
A
×only
B
+only
C
-only
D
-and×
E
+and÷
参考答案
参考解析
解析:
If P @ Q=P, then symbol @ can represent either addition or subtraction, but not multiplication or division. Since it is also given that P @ Q=Q @ P, the operation @ is commutative. Since addition is commutative and subtraction is not commutative, the symbol @ represents only addition.
If P @ Q=P, then symbol @ can represent either addition or subtraction, but not multiplication or division. Since it is also given that P @ Q=Q @ P, the operation @ is commutative. Since addition is commutative and subtraction is not commutative, the symbol @ represents only addition.
更多 “单选题Let @ represent one of the four basic arithmetic operations such that, for any nonzero real numbers P and Q, P @ 0=P and P @ Q=Q @ P. Which arithmetic operation(S) does the symbol @ represent?A ×onlyB +onlyC -onlyD -and×E +and÷” 相关考题
考题
有以下程序: include void funl (char * p){char * q; q=p; while( *q! ='\0') } (*q)
有以下程序: #include <stdio.h>void funl (char * p){ char * q; q=p; while( *q! ='\0') } (*q) ++;q++;}mains( ){ char a[ ] = { "Program" } , * p; p = a[3]; fun1 (p); printf("% s \n" ,a);}程序执行后的输出结果是( )。A.ProhsbnB.PrphsbnC.ProgsbnD.Program
考题
若已有以下定义和语句: #include int x=4,y=3,*p,*q,*s; p=x; q=y; s=q; q=NULL; 则下面分别给出的四条语句中,错误的是()A、*q=0;B、s=p;C、*p=x;D、*p=*s;
考题
在以下二难推理中,无效式是()A、(((p→q)∧(r→s))∧(p∨r))→(q∨s)B、(((p→q)∧(r→s))∧(∨)C、((p→q)∧(p→r))∧(∨))→pD、(((p→q)∧(r→q))∧(p∨r))→q
考题
在下列选言推理形式中,无效的有()。A、(p∨q)∧p├﹁qB、(pqr)∧﹁p├q∧rC、(pqr)∧﹁p├qrD、(p∨q∨r)∧﹁p├q∨rE、(p∨q∨r∨s)∧(﹁p∧﹁q)├r∨s
考题
下列推理形式中,无效的有()。A、((p∨~q)∧q)→~pB、((p∧q)∧r)→(p∧r)C、((~p→q)∧q)→~pD、((p→q)∧(r∧p))→qE、(p→q)∧(r→s)∧(q∨s))→(p∨r)
考题
单选题The symbol ☆ represents one of the fundamental arithmetic operators:+, -, ×, or ÷. If (x☆y)÷(y☆x)=1 for all positive values of x and y, then ☆ can represent ______.A
+ onlyB
÷onlyC
+ or × onlyD
- or × onlyE
+, -, ×, ÷
考题
单选题The average of a, b, c, and d is p. If the average of a and c is q, what is the average of b and d in terms of p and q?A
2p+qB
2p – qC
2q +pD
2q-pE
(2p+q)/3
考题
单选题在利用指数体系分析价格(用p表示)和销售量(用q表示)变动对销售额的影响时,销售量指数的计算公式是( )。A
∑p1q1/∑p0q0B
∑p1q1/∑p1q0C
∑p1q1/∑p0q1D
∑p0q1/∑p0q0
考题
问答题试判断以下各式是否为重言式。 (1)(P→Q)→(Q→P) (2)P→(P→Q) (3)Q→(P→Q) (4)(P∧Q)→(P→Q) (5)((P→Q)∨(R→Q))→((P∨R)→Q) (6)((P→Q)∨((R→S))→((P∨R)→(Q∨S))
考题
单选题p0和p1分别是基期和报告期的质量数值,q0和q1别是基期和报告期的数量数值,帕式质量指数的一般计算公式是( )。A
∑p0q1/∑p0q0B
∑p1q0/∑p0q0C
∑p1q1/∑p1q0D
∑p1q1/∑p0q1
考题
多选题下列推理形式中,无效的有()。A((p∨~q)∧q)→~pB((p∧q)∧r)→(p∧r)C((~p→q)∧q)→~pD((p→q)∧(r∧p))→qE(p→q)∧(r→s)∧(q∨s))→(p∨r)
考题
单选题在以下二难推理中,无效式是()A
(((p→q)∧(r→s))∧(p∨r))→(q∨s)B
(((p→q)∧(r→s))∧(∨)C
((p→q)∧(p→r))∧(∨))→pD
(((p→q)∧(r→q))∧(p∨r))→q
考题
单选题若已有以下定义和语句: #include int x=4,y=3,*p,*q,*s; p=x; q=y; s=q; q=NULL; 则下面分别给出的四条语句中,错误的是()A
*q=0;B
s=p;C
*p=x;D
*p=*s;
考题
单选题Two circles, P and Q, lie in the same plane. If the center of circle Q lies on circle P, then in how many points could circle P and circle Q intersect?Ⅰ. 0Ⅱ. 1Ⅲ. 2A
Ⅰ onlyB
Ⅱ onlyC
Ⅲ onlyD
Ⅰ, Ⅱ and ⅢE
Ⅱ and Ⅲ only
考题
多选题在下列选言推理形式中,无效的有()。A(p∨q)∧p├﹁qB(pqr)∧﹁p├q∧rC(pqr)∧﹁p├qrD(p∨q∨r)∧﹁p├q∨rE(p∨q∨r∨s)∧(﹁p∧﹁q)├r∨s
考题
问答题If M is a set of five numbers p, q, r, s and t, is the range of numbers in M greater than 5? (1) The average (arithmetic mean) of p, q, r, S, and t is 5. (2) p-r5.
热门标签
最新试卷