Maths proof helpWatch
Identify the rational number for which the students argument is not true.
Could someone explain how to do this question please?
you need to think about it.
Ive started by assuming qy is rational and qy = a/b where b doesn't equal zero but don't know where to go from there.
let us call the rational number we are multiplying by a/b and the rational product c/d
=====> aW/b = c/d
=====> W = (bc)/(ad)
can you continue ?