复数是高中数学的选修内容,高考试题也较简单,只需掌握基本题型和通法即可.那么,复数有哪些常考题型呢?下面分类例析.1复数的概念型方法提炼:形如a+bi(a,b∈R)的数称为复数,当a=0,b≠0时,a+bi表示纯虚数;当a≠0,b=0时,a+bi表示实数.例1设a是实数,且1+ai+12+i是实数,则a=().A21; Complex number is the high school math elective content, college entrance examination questions is also relatively simple, just master the basic questions and pass the law can. Then, what are the complex often test questions? The following classification.1 complex concept-based method to extract: For example, a + bi (a, b∈R) is called a complex number. When a = 0 and b ≠ 0, a + bi means pure imaginary number; when a ≠ 0 and b = 0, a + bi means real number. Example 1 Let a be a real number and 1 + ai + 12 + i be a real number, then a = (). A21;