设 [tex=8.643x1.357]IKgezQclZX20IUcuEroU4/BVXShHsYGUJc+WU+4X5xU=[/tex],且 [tex=13.071x1.286]Pc82c1aEOS9Zjq5v8F44VKQ05BeoWWNMddta2zd+JsN+5y+xPxY4EMhar1TA5gJT[/tex] 试证 [tex=4.571x1.357]A1ATY1y3t8r8oiZnIOImiQ==[/tex].
举一反三
- 设 [tex=0.786x1.286]dSWbQCTjdbLxKy7q0ps2gg==[/tex] 是数域. [tex=8.643x1.357]IKgezQclZX20IUcuEroU4/BVXShHsYGUJc+WU+4X5xU=[/tex],且 [tex=10.071x1.357]krqQeYxsOxi5rxwnEg9b+zEHPRRQ/uB5OEbnX///vEM=[/tex] 试证 [tex=4.571x1.357]1eNWbtl2SJ1RBajnCotCJA==[/tex] .
- intx=5,y=8,z=7;表达式z=!(x>y)||(x=1,y=3)计算后的结果 A: x=1,y=3,z=1 B: x=1,y=3,z=0 C: x=5,y=8,z=0 D: x=5,y=8,z=1
- 设A=,且A的特征值为1,2,3,则有() A: x=2,y=4,z=8 B: x=-1,y=4,z∈R C: x=-2,y=2,z∈R D: x=-1,y=4,z=3
- 执行以下语句的结果:dict1={"x":1,"y":2,"z":3}dict2={"x":4,"a":5}dict1.update(dict2) A: {"x":1,"y":2,"z":3,"x":4,"a":5} B: {"x":4,"a":5,"x":1,"y":2,"z":3} C: 有重复项,结果有误! D: {"x":4,"y":2,"z":3,"a":5}
- 有代码片段:function f(y) {var x=y*y;return x;} for(var x=0;x< 5;x++) {y=f(x);document.writeln(y);}输出结果是( )。 A: 0 1 2 3 4 B: 0 1 4 9 16 C: 0 1 4 9 16 25 D: 0 1 2 3 4 5