In this question x * y means if x < y, and if x is larger or equal to y.
a) Find the value of
i) 5 * 8
So x = 5 and y = 8. Clearly, x<y, so just substitute the values 'x=5' and 'y=8' into the first equation to give:
This simplifies to give an answer of 7.
Can you apply this to part ii)?
Then for part b) iii)
We know that y=7 and the answer is 8. Substituting that into the original equation:
As this value of x is greater than our value of y, however, this is incorrect as we can only use this equation 'if x < y'
So you'll have to substitute the values into the second equation.
Can you apply this to part ii?
FInally, part c. I don't understand part c as it seems to me that there could be almost infinite values for that equation. Is it not just trial and error?