This is a silly question,but i have a problem.How do we solve derivative of -x using first principle of derivative. I know that if derivative of x w.r.t x is 1 then ofcourse that of -x should be -1. Also it can be solved by product rule taking derivative of -1.x .
The Attempt at a Solution
Here is how i attempted it:
Using first principle :
dy/dx = [-x+h-(-x)]/h
what is wrong here?please help. Thanks in advance