in definition of division it says:
let a and b be two quantities. then the division of a by b is that quantity which, when multiplied by b, produces a.
now my question is "does a and b represents any two numbers?" because if b=0, then how can we find quotient?
If b=0, then 5ab = 0.
Like "Alfred" said: If b = 0, then you can't do "division of a by b" because you can't divide by 0. And you can't do "when multiplied by b, produces a" (unless a = 0 too) because anything times 0 is just 0. So the question doesn't make sense.
Do you mean "if b=1" ?
no alfred,its a different topic
Your question didn't make sense in context, so I think "Alfred" was trying to figure out what you meant. I'm not sure what you're asking either. Do you maybe mean that they should have said that b should be a non-zero quantity, and then the rest follows? So it should be like this:
"Let a and b be two quantities, with b non-zero. Then 'the division of a by b' is that quantity c such that, when c is multipled by b, the result is a. In other words, the division is defined as c, such that bc = a."