## anonymous 4 years ago how do you find the derivative of (4)/(7x) so that it may equals (-4)/(7x^2). please show calc involved

$(4/7)x ^{-1}$ Now it is simple to use the power rule. getting -1(4/7)x^-2. This then becomes$-4\over7x ^{2}$

2. anonymous

don't you just plug it in to f(x)=lim f(x+h)-f(x)/h?