单选题For what value of p is (x-2)(x+2) = x(x -p)?A-4B0C2/xD4/xE-x/4
单选题
For what value of p is (x-2)(x+2) = x(x -p)?
A
-4
B
0
C
2/x
D
4/x
E
-x/4
参考解析
解析:
Multiply on each side of the given equation, (x - 2)(x + 2) = x(x -p). The result is x2 - 4 = x2 – xp, so 4 = xp and p = 4/x.
Multiply on each side of the given equation, (x - 2)(x + 2) = x(x -p). The result is x2 - 4 = x2 – xp, so 4 = xp and p = 4/x.
相关考题:
有以下程序: #include stdio.h main( ) { struct node{int n; struct node*next;} *P; struct node x[3]={{2,x+1),{4,x+2},{6,NULL}}; P= X; printf("%d,",p-n); printf("%d\n",p-next-n); } 程序运行后的输出结果是( )。A.2,3B.2,4C.3,4D.4, 6
x的分布列为:其中有关P(1≤x<4)的下列说法中,正确的是( )。A.P(1≤x<4)=P2+P3+P4B.P(1≤x<4)=1-P(x<1)-P(x=4)C.P(1≤x<4)=1-P1-P5D.P(1≤x<4)=P(1<x<4)E.P(1≤x<4)=P(1<x≤4)
试题37有以下程序#include stdio.hmain(){ struct node {int n; struct node *next; }*p;struct node x[3]={{2,x+1},{4,x+2},{6,NULL}};p=x;printf(“%d,”, p?n);printf(“%d\n”, p?next?n);}程序运行后的输出结果是()A.2,3B.2,4C.3,4D.4,6
设X的分布列为,概率P(2≤X4)E.P(X 设X的分布列为,概率P(2≤X<5)=( )。A.p2+p3+p4+p5B.p2+p3+p4C.P(X<5)-P(X<2)D.1-P(X<2)-P(X>4)E.P(X≤4)-P(X<2)
设随机变量X服从正态分布N(1,22),则有( )。A.P(X1)=P(X1)B.P(X2)-P(X2)C.PD.XE.1)=P(X1)+P(X-1)F.PG.XH.1)=P(X1)4-P(X-1)P(0X≤3)=P(-1X≤2)
已知函数f(x)=㏑(x+2)-x2+bx+c, (1)若点P(-1,0)在f(x)的图象上,过点P的切线与直线y=-x+2平行,求f(x)的解析式;(2)若f(x)在区间[0,2]上单调递增,求b的取值范围。
在用if–a和ppptable命令配合查看各个端口建链状态时,ppptable命令显示的条目序号pppX和if-a显示的条目序号Y对应的关系是()A、X+2=YB、X-2=YC、Y+2=XD、X=Y
多选题设X的分布列为 X 1 2 3 4 5 P p1 p2 p3 p4 p5 概率P(2≤X<5)=( ).Ap2+ p3+p4+p5Bp2+ p3+p4CP(X<5)- P(X<2)D1- P(X<2)-P(X>4)/p
单选题有以下程序:#include main(){ struct node { int n; struct node *next; } *p; struct node x[3] = {{2,x+1},{4,x+2},{6,NULL}}; p=x; printf(%d,,p-n); printf(%d,p-next-n);}程序运行后的输出结果是( )。A2,3B2,4C3,4D4,6