Is it possible for two different inputs to give you the same output? Please give an explanation.😄
input x=2 output is 4
input x=-2 output is 4
Two different inputs give the same output.
Another example: y(x) = sin(x)
y(pi/2) = 1
y(5pi/2) = 1
Even more extreme: y(x) = constant
Any input gives the same output!