Răspuns:
Z=1/X-1/Y
Z=2,7 - 1/3/2
Z=2,7-2/3
Z*(X-Y*Y) = (2,7-2/3) (2,7-9/4) = `(27/10-2/3)(27/10-9/4)= [(27*3-20)/30][(24*4-9*10)/40] = 61/30 *18/40= 61/10*3/20 = 183/200= 183/(2*100)= 1,83*1/2
Explicație pas cu pas:
