The purpose of this paper is (1) to present how general education elementary school age students constructed computer passwords using digital root sums and second-order arithmetic sequences, (2) argue that computer password construction can be used as an engaging introduction to generate interest in...
【解析】 Solution: Let the common difference of the arithmetic se quence be d. We are given that$$ a _ { 3 } = - 6 , a _ { 6 } = 0 $$ Therefore$$\left\{ \begin{matrix} a _ { 1 } + 2 d = - 6 \\ a _ { 1 } + 5 d = 0 \end{matrix} \right.$$ Solving...
Example 2: In an arithmetic sequence a, the sum of first n terms is Sn. I fS_3=6 , a_1=4 , find the common difference d. It is ( ).(A)1( B 5/3(C)-2(D)3 相关知识点: 试题来源: 解析Solution: (C) Method 1: By formula(3), we have d3 1 3 1 3 1 2 3-1 2 2...
Hence, solve is as appropriate as factor in a problem such as this. The Context Panel option Solve≻Obtain Solutions for≻x returns the sequence of solutions 1,−1,12−2−2I3√−−−−−−−−−−−√,−12−2−2I3√−−−−−−−−−...
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Refer to the examples of Mean proportion to understand the Right sequence of steps you have to follow to solve a particular problem. Make sure that you know the derivations of a formula or a theorem as they will come in handy while solving a complex question based on Mean proportion. ...
Example 17: The sum of the first n terms of the arithmetic sequence {$$ a _ { n } $$} is $$ S _ { n } $$. The sum of the first n terns of the arithmetic sequence |$$ b _ { n } $$} is $$ T _ { n } $$. Find a$$ \frac { a _ { 6 } } { b _ { 6 ...
【题目】Example 17: The sum of the first n terms of the arithmetic sequence {$$ a _ { n } $$} is $$ S _ { n } $$1. The sum of the first n terns of the arithmetic sequence | $$ b _ { n } $$} is $$ T _ { n } $$. Find $$ \frac { a _ { 6 } } { b...
The cosine function is positive in the first and fourth quadrants; hence the two solutions of the second equation. • Calculations like this often arise as part of the solution of a calculus problem. Knowledge of basic trigonometry is a great asset in calculus. ...
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