一、设计思路本节课通过归纳二次展开式的系数和字母结构的规律,结合给出的例子观察、类比、猜想、归纳出二项式定理,并对二项式定理进行初步应用。二、教材地位、重难点二项式定理是代数乘法公式的推广,这节课的内容安排在计数原理之后学习,一方面因为他的证明要用到 First, the design ideas This lesson by summarizing the law of the quadratic expansion of the coefficient and the letter structure, combined with given examples of observation, analogy, guess, summed up the binomial theorem, and preliminary application of the binomial theorem. Second, the status of teaching materials, heavy and difficult Binomial theorem is the promotion of algebraic multiplication formula, the contents of this lesson arranged after the counting principle to learn, on the one hand because of his proof to use