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数列求和是高考试题的重要组成部分,高考重点考查的是公式求和法、裂项求和法和错位相减求和法,其中裂项求和法对数式的变换有较高的要求,需掌握一些常见的变换技巧。数列求和的基本思想是转化,即把数列通过分组、变换通项、变换次序等方法,把数列的求和转化为能用公式求解或者是能通过基本运算求解的形式,达到求和的目的,同学们要深刻认识转化思想在数列求和中的应用。下面结合近年高考题谈谈数列求和问题的热点考试方向。考向1:直接利用等差、等比
Summation of the series is an important part of the college entrance examination questions, the entrance exam focuses on the formula summation method, the split-item summation method and the disjunction sum-subtraction method, in which the split-item summation method has a higher logarithmic transformation, Need to master some common transformation skills. The basic idea of sequence summation is transformation. That is to say, the sequence is converted into summation through the methods of grouping, transformation, and order of transformation, and the summation of the sequences can be converted into the form that can be solved by formulas or can be solved by basic operations. , Students should profoundly understand the application of transformation thinking in the summation of series. The following combination of college entrance examination questions in recent years to discuss the issue of the sequence of hot test direction. Test 1: direct use of equal, equal