Question

calcule o valor da expressão a+b/1-ab para a=1 e b=-2

Answer 1

(1/2+1/3)/(1-(1/2*1/3)= 
(3+2)/6:[1-(1/6)]= 
5/6:[1-1/6]= 
5/6:[6-1)/6= 
5/6:5/6= 
5/6*6/5=1