MRS for Cobb Douglas Utility: The EASY WAY!!!

I show a trick for finding the Marginal Rate of Substitution function if you have a Cobb Douglas utility function. Works for MRTS (marginal rate of technical substitution) as well. If you want to know why I use U=(x^a)(y^b) rather than U=(x^a)(y^(1-a)), see video here:    • Do Cobb Douglas Utility Exponents HAVE TO ...