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File information
File Name :
(File not down)
File Size :1125631 byte
File Type :application/vnd.ms-cab-compressed
Scanner results
Scanner results:<font color="#%Scanner(s) (0/39)found malware!
Time: <font color="#15-03-19 10:39:35 (CST)
Engine Ver
Scan result
Found nothing
7.11.218.66
Found nothing
AVL SDK 3.0
Found nothing
Found nothing
9.0.0.4453
9.0.0.4453
Found nothing
Found nothing
Found nothing
4.1.3.52192
Found nothing
Found nothing
bitdefender
Found nothing
Found nothing
Found nothing
Found nothing
5.0.2.3300
Found nothing
25.074, 25.074
Found nothing
6.5.1.5418
Found nothing
Found nothing
Found nothing
Found nothing
V1.32.31.0
Found nothing
Found nothing
Found nothing
Found nothing
Found nothing
Found nothing
Found nothing
9.500-1005
Found nothing
Found nothing
Found nothing
Found nothing
25.58.00.04
25.58.00.04
Found nothing
Found nothing
3.9.2623.2
3.9.2623.2
Found nothing
Found nothing
Found nothing
Found nothing
17.47.17308
1.0.2.2108
Found nothing
Found nothing
virusbuster
15.0.985.0
Found nothing
■Heuristic/Suspicious ■Exact
NOTICE: Results are not 100% accurate and can be reported as a false positive by some scannerswhen and if malware is found. Please judge these results for yourself.
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You can view the results of the last scan or rescan解：观察（1）（2）（3）式及所求代数式中a1、a2、a3、a4、a5、a6、a7这七个未知数前面的系数，可以发现每个未知数前面的四个系数依次是n2、（n+1）2、（n+2）2、（n+3）2，而这四个数之间有下列关系：n2-3（n+1）2+3（n+2）2=（n+3）2，∴所求代数式的值=（1）-3（2）+3（3）=8+3×28=1468．分析：观察（1）（2）（3）式及所求代数式中a1、a2、a3、a4、a5、a6、a7这七个未知数前面的系数，发现每个未知数前面的四个系数依次是n2、（n+1）2、（n+2）2、（n+3）2，得出它们之间的关系．点评：此题主要考查了因式分解式的综合应用，关键是由已知发现它们之间的关系，技巧性比较强．
请在这里输入关键词：
科目：初中数学
如图，已知A1，A2，A3，…，An是x轴上的点，且OA1=A1A2=A2A3=…=AnAn+1=1，分别过点A1，A2，A3，…，An+1作x轴的垂线交一次函数x的图象于点B1，B2，B3，…，Bn+1，连接A1B2，B1A2，A2B3，B2A3，…，AnBn+1，BnAn+1依次产生交点P1，P2，P3，…，Pn，则Pn的横坐标是．
科目：初中数学
如图，已知A1，A2，A3，…，A2006是x轴上的点，且OA1=A1A2=A2A3=…=A2005A2006=1，分别过点A1，A2，A3，…，A2006作x轴的垂线交二次函数y=x2（x≥0）的图象于点P1，P2，P3，…，P2006点，若记△OA1P1的面积为S1，过点P1作P1B1⊥A2P2于点B1，记△P1B1P2的面积为S2，过点P2作P2B2⊥A3P3于点B2，记△P2B2P3的面积为S3，…，依次进行下去，最后记△P2005B2005P2006的面积为S2006，则S2006-S2005=1．
科目：初中数学
已知a1，a2，a3，…，an的平均数为2，方差为5，则2a1，2a2，2a3，…，2an的平均数为2，方差为20．
科目：初中数学
关于x、y、z的方程组1y+z=a2z+x=a3中，已知a1＞a2＞a3，那么将x、y、z从大到小排起来应该是（　　）A．x＞y＞zB．y＞x＞zC．z＞x＞yD．无法确定
科目：初中数学
已知a1，a2，a3，…，a1996，a1997均为正数，又M=（a1+a2+…+a1996）（a2+a3+…+a1997），N=（a1+a2+…+a1997）（a2+a3+…+a1996），则M与N的大小关系是（　　）A、M=NB、M＜NC、M＞ND、关系不确定}