【判断题】
自然数里,a=2,f (x,y)=x+y,g (x,y)=x·y,F (x,y): x=y。公式“xy(F(f(x,a),y) ?F(f(y,a),x))”的真值为假。
【简答题】
曲线Y=x2-x在点(1,0)处的切线斜率为[填空]
【判断题】
实数集合里,a =0,f (x,y)=x-y,F(x,y): x=y, G(x,y): xy。公式“xy(F(f(x,y),a) ?G(x,y))”的真值为假。
【单选题】
已知M点在N点正前方,则M和N两点的( )坐标值不相等。
【判断题】
公式“x$y(F(x, y) ù G(y, z)) ú $xH(x, y, z)”中的全称量词x的辖域为:$y(F(x, y) ù G(y, z)) 。
【单选题】
A点坐标为(10、20、30),B点坐标为(30、20、30)则AB距离为______。
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铅垂线
【判断题】
只有在节气门全关、车速为零时,才进行怠速控制
【单选题】
集合A={1,2,…,10}上的关系R={x,y|x+y=10,x∈A,y∈A},则R的性质是( )
【单选题】
曲线y=3x与y=log3x的对称轴为( )