Question

If A = {1,2,3,4} and f :A® R is a surjection defined f(x)=x^2+x+1/x+1then find range f.

Answer 1

A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths--or colors. When light exits the droplet, it makes a rainbow.