180355680d29db6.bmp如图电路实现的逻辑函数是
A: F= ∑（W,X,Y,Z）(0,1,3,7,9,13,14)
B: F= ∑（W,X,Y,Z）(0,1,3,7,8,13,14)
C: F=W'X'Y'+W'YZ+WY'Z+WXYZ'
D: F=W'X'Y'+W'YZ+WYZ+W'XYZ'
A: F= ∑（W,X,Y,Z）(0,1,3,7,9,13,14)
B: F= ∑（W,X,Y,Z）(0,1,3,7,8,13,14)
C: F=W'X'Y'+W'YZ+WY'Z+WXYZ'
D: F=W'X'Y'+W'YZ+WYZ+W'XYZ'
举一反三
- 下列等式正确的有：{多选题} A: w'z' + w'xy + wx'z + wxyz = w'z' + xyz + wx'y'z + wyz B: z + y' + yz' = 1 C: xy'z' + x' + xyz' = x' + zy' D: xy + x'z + yz = xy + x'z
- 公式"x ( F(x,y,z ) → "y ( G(x,y,z) → "z H(x,y,z) ) )的前束范式为 A: "x$y$z (F(x,t,w) → ( G(x,y,w ) → H(x,y,z) ) ) B: $x$y$z (F(x,t,w) → ( G(x,y,w ) → H(x,y,z) ) ) C: "x"y$z (F(x,t,w) → ( G(x,y,w ) → H(x,y,z) ) ) D: "x$y"z (F(x,t,w) → ( G(x,y,w ) → H(x,y,z) ) )
- 设\(w = f(x + y + z,xyz)\)，其中\(f\)有连续偏导数，则\( { { {\partial}w} \over {\partial {x}}} =\) A: \({f'_1} + yz{f'_2}\) B: \(x{f'_1} + yz{f'_2}\) C: \(yz{f'_1} +x{f'_2}\) D: \({f'_1} +{f'_2}\)
- 下列程序的输出结果是（ ） void f(int v,int w) { int t; t=v;v=w;w=t; } int main() { int x=1,y=3;z=2; if(x>y) f(x,y); else if(y>z) f(y,z); else f(x,z); printf(“%d,%d,%d\n”,x,y,z); }
- 关系模式R(W,X,Y,Z),其函数依赖的集合是F=｛WX→Y, W→X, X→Z, Y→W｝,其候选键为： A: W和Y B: WY C: WX D: WZ