I never disagreed with you. Rather, I recognized that it IS the correct process for calculating the necessary resistance. If I didn't say it before, Jon Chandler is correct.This equation is 100% correct
Don't know why you seem to have taken offense at my comments. Rather than answering a question that has been correctly and thoroughly answered I chose to offer that additional bit of information that some may not know. I don't assume you know little to nothing, I assume you can relate to something I may say. If I say something incorrect - as has happened on this website more times than I care to recount - someone will correct me right away. And I don't even know what "Mansplaining" is.Thank you for mansplaining to me.