A quick way of calculating the mean of an arithmetic sequence is to use the observation that, when the first and last terms are added, the sum is the same as when the second and next to last terms are added or
5. Given that { $$ a _ { n } $$} is an arithmetic (equal difference) sequence,$$ i f a _ { 1 } = 1 0 , $$$ a n d a _ { 1 0 0 9 } = - 4 0 $$,then the value o f a_{2017 is( )(A)-90. (B) -70. (C)70. (D)90. 相关...
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...
Suppose that \{a_n\} is an arithmetic sequence with what is the value of? Express your answer as a common fraction. Sum =N/2*[2F + (N - 1) * D, where N=Number of terms, F=First term, D=Common difference. First term =101/200, Common difference =1/100, Number of terms =10...
Language is a defining characteristic of our species, but the function, or functions, that it serves has been debated for centuries. Here we bring recent evidence from neuroscience and allied disciplines to argue that in modern humans, language is a tool for communication, contrary to a prominent...
/** * This program prompts the user to enter a phrase * and an energy level. Program output: * * Whats on your mind? Superman * Whats your energy level? 3 * Superman! * Superman! * Superman! */ class Main { function void main() { var String s; var int energy, i; let s...
The sequence 2, 4, 6, 8,... is an arithmetic sequence. What is the common difference? A. 1 B. 2 C. 3 D. 4 相关知识点: 试题来源: 解析 B。解析:这个数列是等差数列,后一项减去前一项为定值,4-2=2,6-4=2,8-6=2,所以公差是 2。
4. In an arithmetic sequence, the first term is I and the last term is 25, The sum of all the terms in the sequence is 117. How many terms does the sequence have? 相关知识点: 试题来源: 解析 解:(117 ×2)÷ (1+25)=234 ÷26=9(项)。
How does an arithmetic logic unit work? Typically, the ALU has direct access to the processor controller, main memory --RAMin a PC -- and the input/output (I/O) of the CPU. I/O flows along an electronic path called abus. The input consists of an instruction word, sometimes called a...
Find the sum of the first ten terms of the Fibonacci sequence. Divide the sum by 11. What do you observe? What is the recursive formula for an arithmetic sequence? How does the Fibonacci sequence relate to nature? Considering the Fibonacci sequence, a power series is given by: ...