分段函数 e-x x>0 (e的-x次方) y= 1 x=0 ex x<0(e的x次方)
分段函数 e-x x>0 (e的-x次方) y= 1 x=0 ex x<0(e的x次方)
参考答案和解析
\({\rm{ - }}{1 \over { { x^2}}}\)
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有关c++问题 1.计算下列分段函数,X由键盘输入。0 (x=-10.0)y= x (-10.0x=10.0)2x-3(x10.0)#include"stdio.h"main(){float x,y;if(x=-10.0)y=0;else if (1) y=x;else y=2*x-3;printf(“%f\n”,x);}
与“y=(x0?1:x0?-1:0)”;的功能相同的if 语句是( )。A.if(x0)y=1; else if(x0)y=1; else= y=0;B. x=0)y=1; else if(x0)y=-l; else= y=0;C.y=-l x=O)y=1; else if(x=-0)y=0; else y=-l;D.y=0; if(x=0) if(x=0)y=1; else y=-l;
与“y=(x0?1:x0?-1:0)”;的功能相同的if 语句是( )。A.if(x0)y=1; else if(x0)y=1; else y=0;B.if(x) if(x0)y=1; else if(x0)y=-l; else y=0;C.y=-l if(x) if(xO)y=1; else if(x=-0)y=0; else y=-l;D.y=0; if(x=0) if(x=0)y=1; else y=-l;
与y=(x>0? 1:x0)y=1 else if(x 与y=(x>0? 1:x<0? -1:0);的功能相同的if语句是A.if(x>0)y=1 else if(x<0)y=-1; else y=O;B.if(x) if(x>0)y=1; else if(x<0)y=-1;C.y=-1; if(x) if(x>0)y=1; else if(x==0)y=0; else y=-1;D.y=0; if(x>=0) if(x>0)y=1; else y=-1;
与y=(x>0?1:x0)y=1; else if(x 与y=(x>0?1:x<0?-1:0):的功能相同的if语句是( )A.if(x>0)y=1; else if(x<0)y=-1; else y=0; else y=0;B.if(x) if(x>0)y=1; else if(x<0)y=-1;C.y=-1; if(x) if(x>0)y=1; else if(x==0)y=0; else y=-1;D.y=0; if(x>=0) if(x>0)y=1; else y=-1:
下面的程序段所表示的数学函数关系是( ) y=-l; if( x!= 0)if(x0)y=l; else y=0 ; 1(x0) 1(x0)A.y= { 0(x= 0)B.y={-l(X=0) 1(X0) 0(X0) o(X 0) -l(X 0)C.y= {-1(x= 0)D.y={ 1(X= 0) 1(X 0) 0(X 0)
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