Find the derivative: since the function is f(x) = (1-3x)^(1/3), the derivative is f'(x)=1/3(1-3x)^(-2/3) *(-3) =-(1-3x)^(-2/3) =evenutally we get an answer but thats not what im confused about where did the *(-3) come from? what does it mean? it made me get a different answer and i don't understand where it came from? please help asap