Question

f(x)=1/x calcule f(x+h)/h - f(x)/h

Answer 1

f(x+h)-f(x)

=1/(x+h) - 1/x

=(x-x-h)/x(x+h)=-h/x(x+h)

[f(x+h)-f(x)]/h

=-h/x(x+h)/h

=-h/xh(x+h)

=-1/x(x+h)