Question

A={x|xEN and x < 10}

Answer 1

i spose you need to define the set?

Answer 2

well, it is defined as is ... maybe defined in roster form?

Answer 3

it means x is a natural number and less than 10\
write down the natural number less than 10
natural number alwys positive integer

Answer 4

natural number has controversy to it. so it has to be author defined. some say N starts at 0, others say it starts at 1

Answer 5

general definition is it starts with one

Answer 6

but in some field,,its consider as 0 as start point

Answer 7

lol, general definition is in controversy. So it has to be author defined for clarity.

personally, I like it starting at 1.

Answer 8

http://www.wolframalpha.com/input/?i=natural+number

Answer 9

actually zero is included latter in 18th or 19th century ..i dont remember exactly

Answer 10

yeah its stated their intro of zero in 1968