Behaviour being used: Adaptive mode
Minimum fraction: 0
Question summary: Given the following functions, choose the ones which define a distance [Error converting from MathML to accessible text.]The functions are given in [real numbers to the power of n], being [x equals open parentheses x subscript 1 comma... comma x subscript n close parentheses] and [y equals open parentheses y subscript 1 comma... comma y subscript n close parentheses large right parenthesis] : [d left parenthesis x comma y right parenthesis equals sum from i equals 1 to n of open vertical bar x subscript i minus y subscript i close vertical bar]; [d left parenthesis x comma y right parenthesis equals max with 1 less-than or slanted equal to i less-than or slanted equal to n below open vertical bar x subscript i minus y subscript i close vertical bar]; [d left parenthesis x comma y right parenthesis equals sum from i equals 1 to n of open parentheses x subscript i minus y subscript i close parentheses squared]; [Error converting from MathML to accessible text.]; [d left parenthesis x comma y right parenthesis equals large min for 1 less-than or slanted equal to i less-than or slanted equal to n of open vertical bar x subscript i minus y subscript i close vertical bar]; [d left parenthesis x comma y right parenthesis equals open vertical bar x subscript 1 minus y subscript 1 close vertical bar]; [d left parenthesis x comma y right parenthesis equals open square brackets d apostrophe close square brackets], being d' a distance in a metric space X and [open square brackets blank close square brackets] the superior integer part; [d left parenthesis x comma y right parenthesis equals square root of sum from i equals 1 to n of open parentheses x subscript i minus y subscript i close parentheses squared end root]
Right answer summary: [d left parenthesis x comma y right parenthesis equals sum from i equals 1 to n of open vertical bar x subscript i minus y subscript i close vertical bar]; [d left parenthesis x comma y right parenthesis equals max with 1 less-than or slanted equal to i less-than or slanted equal to n below open vertical bar x subscript i minus y subscript i close vertical bar]; [Error converting from MathML to accessible text.]; [d left parenthesis x comma y right parenthesis equals open square brackets d apostrophe close square brackets], being d' a distance in a metric space X and [open square brackets blank close square brackets] the superior integer part; [d left parenthesis x comma y right parenthesis equals square root of sum from i equals 1 to n of open parentheses x subscript i minus y subscript i close parentheses squared end root]
Question state: todo