皮皮学，免费搜题
登录
搜题
【简答题】
已知（3x-1） 7 =a 7 x 7 +a 6 x 6 +…+a 1 x+a 0 求 （1）a 1 +a 2 +…+a 7 ； （2）a 1 +a 3 +a 5 +a 7 ； （3）a 0 +a 2 +a 4 +a 6 ； （4）|a 0 |+|a 1 |+|a 2 |+…+|a 7 |．（要求算出最终结果）
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【判断题】Folk tales say the game originates from the activities of seeking Qu Yuan's body, but experts, after painstaking and meticulous research, conclude that dragon boat racing is a semi-religious, semi-ent...
A.
正确
B.
错误
【单选题】It’s said that there are plenty of hotels in Shanghai. There _____ be any difficulty for you to find somewhere to stay.
A.
wouldn’t
B.
shouldn’t
C.
mustn’t
D.
needn’t
【单选题】You must phone the police when you find any suspicious guy _________ the house late at night.
A.
hanging out
B.
hanging up
C.
hanging round
D.
hanging together
【简答题】And experts say a______ can actually be a serious problem.
相关题目：