100²-99²+98²-97²+96²-95²...+2²-1²
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/12 08:39:40
![100²-99²+98²-97²+96²-95²...+2²-1²](/uploads/image/z/1964229-69-9.jpg?t=100%26%23178%3B-99%26%23178%3B%2B98%26%23178%3B-97%26%23178%3B%2B96%26%23178%3B-95%26%23178%3B...%2B2%26%23178%3B-1%26%23178%3B)
x)340PS64ֵ0--`"03)m36IET4MΆڮ{h=.
XZh[C--tL)TL|N'ڞmZlNmO{>{Ǔ3N{9w
XoePig/Hlk'<:ɎZ5o~ڵ Ɏ]igo9+@
z8h l@ 8
100²-99²+98²-97²+96²-95²...+2²-1²
100²-99²+98²-97²+96²-95²...+2²-1²
100²-99²+98²-97²+96²-95²...+2²-1²
(100+99)(100-99)+(98+97)(98-97)+(96+95)(96-95)+.
看懂了没有,其实相乘后面就是1,然后前面因子留下的想加就为100+99+98+97+.1.
现在就会做了吧.