1.问remainder,把x=-2带入 x^4-5x^2-10x-12 =,答案就是余数(你也可以用常除法,根据题目意思,不过速度很慢)
2....我通常是画图,毕竟都是选择题
3.what is the y-intercept of the line tangent to the circle x^2+y^2=1 at the point (3/5, 4/5)
圆x^2+y^2=1与线性方程在点(3/5, 4/5)相切,这条线性方程的截距是?(翻译出来应该就明白了吧,我第一次也没读懂
4. Given the statement " If ∠ABC is a right angle, then it measures 90 ," an indirect proof of the statement could begin with which of the following assumptions?
如果是∠ABC是一个直角,那么度数是90.可以直接得出下面那个假设?
5. by the rational roos test, how many possible rational roots does f(x)=4x^3-x^2+10x-6 have?
f(x)=4x^3-x^2+10x-6 可能有哪些有理根?
(可以用笛卡尔规则or看degree?)
你补充的那2个问题....
1.f(x)=(x-2)^3+6
f(x)=-(x-2)^3-6
2.f(x)=∣x-1∣- 5 关于 y=-5 对称的方程怎么算?
感觉很麻烦....哪上面来的?
我不知道方法
如果考试遇到时间充裕就画图,取点,拟合个方程....(通常放弃
这是选择题吧,画图,带值,排除..