复数2+i1+i（i是虚数单位）的实部是．

Question

复数 (2+i)/(1+i) （i是虚数单位）的实部是______．

Answer 1

(2+i)/(1+i) = ((2+i)(1-i))/((1+i)(1-i)) = (3-i)/(2) = (3)/(2) -(1)/(2) i
实部为 (3)/(2)
故答案为： (3)/(2)