hello all,
question:
$\displaystyle f(x)=1/x $ evaluate $\displaystyle f(x)-f(a)/x-a$
thank you
thank you for the help guy, but it seems like that wasn't the answer =|
i think i have miswritten the question, i'll retry:
if $\displaystyle f(x)=1/x$
evaluate
$\displaystyle [f(x)-f(a)]/(x-a)$
and the answer is supposed to be: $\displaystyle -1/ax$
i need a working out, thank you very much all you guys and girls
thank you, thats the step i got up to:
$\displaystyle
\frac{\frac{a-x}{ax}}{x-a}
$
and i continued as follows, correct me if i am wrong:
$\displaystyle \frac{a-x}{ax*(x-a)}$
expanding:
$\displaystyle \frac{a-x}{ax(sqr)-a(sqr)x}$
and here is where i get stuck, don't know how to continue or simply that, thanks again