Question

Упростить выражение (st/s^2-t^2+t/2t-2s)*s+t/2t

Answer 1

$( \frac{st}{(s-t)(s+t)} + \frac{t}{2(t-s)} )* \frac{t+s}{2t}= \frac{2st-st- t^{2} }{2*(s-t)(s+t)}* \frac{s+t}{2t}= \frac{st- t^{2} }{2(s+t)(s-t)} = \frac{t(s-t)}{2(s-t)}* \frac{1}{2t}$=1/4