问题
解答题
求下列式子中x的值．
（1）x2-25=0；
（2）64（x+1）3=27．
答案
（1）由x2-25=0，得
x2=25
∴x=±5；
（2）由64（x+1）3=27，得
（x+1）3=27 64
∴x+1=3 4
即x=-
．1 4
搜题请搜索小程序“爱下问搜题”
求下列式子中x的值．
（1）x2-25=0；
（2）64（x+1）3=27．
（1）由x2-25=0，得
x2=25
∴x=±5；
（2）由64（x+1）3=27，得
（x+1）3=27 64
∴x+1=3 4
即x=-
．1 4
| 根据所给的调查表，用适当的词完成后面的短文。 | ||||||||||||||||||||
All students =100% Most students=51%～99% Some students=1%～50% No students=0% | ||||||||||||||||||||
| Here are the results of students activity survey at No. 18 High School. 1 students do homework every day. 2 students do homework three or four times a week. 3 students do homework once a week. As for surfing the Internet, 4 students surf the Internet every day. 5 students surf the Internet once a week. Some students surf the Internet 6 7 8 9 a week. The results for "watch TW' are interesting. 10 . students watch TV every day. 11 students watch TV once a week. 12 students watch TV three or four times a week. | ||||||||||||||||||||