问题
解答题
己知二次函数y=x2+bx+c，当x=1时y=3；当x=-1时，y=1，求这个二次函数的解析式．
答案
将点（1，3），（-1，1）代入函数解析式得：
，1+b+c=3 1-b+c=1
解得
；b=1 c=1
故此函数的解析式为y=x2+x+1．
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己知二次函数y=x2+bx+c，当x=1时y=3；当x=-1时，y=1，求这个二次函数的解析式．
将点（1，3），（-1，1）代入函数解析式得：
，1+b+c=3 1-b+c=1
解得
；b=1 c=1
故此函数的解析式为y=x2+x+1．
| Passage Three Questions 32 to 35 are based on the passage you have just heard. |
A．High school students are using electronic forms to apply for colleges.
B．High school students are sending more applications compared with the past.
C．The number of high school students’entering college is increasing.
D．High school students have to wait for the admission from top schools.