SAT I 每日一問(wèn):2013年6月28日
作者:滬江英語(yǔ)
來(lái)源:CollegeBoard
2013-06-28 10:14
The Correct answer is A.
Explanation
Since the graph of??in the??contains the point?,?it follows that substituting the value??into??yields?. Hence?,?which simplifies to?,?or?.?Therefore,?.
Alternatively, since the graph of??in the??contains the points?and?,?and the coefficient of??is?,?the equation is equivalent to?,?which multiplies out to?.?Therefore,?.