1、SAT2数学题

The area of the region enclosed by the graph of the polar curve r=1/(sinx+cosx)and the x- and y-axes is( )

2、几道SAT2数学题，数学高手进！！！急急急急急急！！！！重赏！！！！！

这是巴郎上的几道题，求人讲讲！！

1. Observers in two locations sight a rocket at a height of 12km.The angles of elevation from these locations are 80.5°and 68.0°.What is the distance between the two points?

A0.85 B4.27 C5.71 D20.92 E84.50（单位都是km)

2. Which of the following are the coordinates of a focus of 5x²+4x²-20x+8y+4=0?（平方）

A(1,-1) B(2,-1) C(3,-1) D(2,-2) E(-2,1)

3.Which of the following is an asymptote of y=(x²+3x+2)/(2+x)?

Ax=-2 Bx=-1 Cx=0.5 Dx=1 Ex=2

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3、几道SAT2的数学题

1. what is the remainder when the polynomial x^4-5x^2-10x-12 is divided by x+2

2. what are the asymptote of f(x)= 6x^2/4-x^2

我知道x=2和x=-2 但是不知道y=-6 是怎么算出来的

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)

不太懂题目的意思

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?

A. ∠ABC does not measures 90

B. ∠ABC measures 90

C. ∠ABC is a right angle

D. ∠ABC is an obtuse angle

E. ∠ABC measures 30

不太懂题目的意思

5. by the rational roos test, how many possible rational roots does f(x)=4x^3-x^2+10x-6 have?

麻烦了

4、我想问几道SAT2的数学题，我还有一个星期就考试了真的非常急切，谢谢谢谢谢了，万分感激，题目在图片中

题目若看不懂或者看不清都可以问我，真的拜托了谢谢

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