SAT数学题英文太多翻成中文了1、如果不等式6x+3≥a对于常数a成立,那下面哪个选项可能是x的值?答案是a/6但我算的是a-3/62、如果x>0,n是非负整数,2x^n+1+x^n+2=x^n=3,求x^3答案是2x+x^2两个都

Question

SAT数学题
英文太多翻成中文了
1、如果不等式6x+3≥a对于常数a成立,那下面哪个选项可能是x的值?
答案是a/6 但我算的是a-3/6

2、如果x>0,n是非负整数,2x^n+1 + x^n+2 = x^n=3,求x^3
答案是2x+x^2

两个都请写出解答步骤.

还有一道语法题.
Many of the senator's speeches, which were “enthusiastically received” by the
large crowds “that” came to see him, addressed “an important topic”, including
health care and global warming.
已经知道an important topic错了,但是crowds后面的那个that对吗?

Answer 1

1.
6x+3≥a
x≥(a-3)/6
x≥a/6-1/2
而a/6>a/6-1/2,所以a/6可能是x的值.
2.
你的题目有问题,应该是“2x^n+1 + x^n+2 = x^n+3”吧.
x^3=x^(0+3)=2x^(0+1) + x^(0+2)=2x+x^2
3.
对.the large crowds that came to see him.这里的that,是指the large crowds.因为including health care and global warming,所以应该是two important topics.