已知：p为实数．
（1）当p为何值时，k=38？ （2）当p为何值时，k与q的值相等？ |
（1）由题意得k=16p+26．
当k=38时，38=16p+26，
则p=
．3 4
答：当p=
时，k=38．3 4
（2）根据题意，得 q=2（p-1）（p+3）．
当k=q时，则有16p+26=2（p-1）（p+3）．
整理，p2-6p-16=0．
解方程，得p1=8，p2=-2．
答：当p=8或p=-2时，k=q．
| 根据短文内容，选出能填入空白处的最佳选项。选项中有一项为多余选项。 My name is Jessica and I live in New York with my family. I have one brother. My brother goes to work every day, but I don't. __1__ My parents work in my school. My mother is an art teacher and my father is a maths teacher. Sometimes, we have our lunch in the dining hall. But I don't like the food there, so we usually eat at home. My brother doesn't have lunch with us. __2__ My mother likes books. She often reads her novels in the evening. Sometimes, she watches TV or goes shopping with me on Sunday. __3__ He often finishes his work very late in the evening, so my mother always makes food for us. My father loves sports. He can play football, basketball and table tennis. __4__ He often plays table tennis with my brother on Sunday. My brother's favorite thing is music. He usually gives a CD to me for my birthday and I usually send a box of chocolates to him.
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