Hello from MrBillDoesMath!
Answer: 4x
Discussion:
If f(x) = 8/ x, then
f (2/x) = 8 / (2/x) = (8/2) * x = 4x
Thank you,
MrB
It is basically saying you need to substitue 2/x for x into 8/x.
So 8/(2/x) = 8*(x/2) = 4x
