1、sat2数学题，求解

theformulafortheareaenclosedbyanellipseisA=

A=πab, whereaandbareone-halfthelengthsofthemajorandminoraxes,respectively.inthefigureabove,theequationofthecircleis

,thenwhatistheareaenclosedbytheellipse?

要一下过程谢了

2、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

3、SAT2数学题，重金悬赏！！！有关复数

1.If i(复数里的那个i)is a root of x^4+2x^3-3x^2+2x-4=0,the product of the real roots is

A.-4 B.-2 C.0 D.2 E.4

2.The nature of the roots of the equation 3x^4+4x^3+x-1=0is

A.3 positive real roots and 1 negative real root

B.3 negative real roots and 1 positive real root

C.1 negative real root and 3 complex roots

D.1 positive real root,1 negative real root,and 2 complex roots

E.2 positive real roots,1 negative real root,and 1 complex root

4、一道SAT2数学题

s vertices ,no two of which lie on the same edge.If the edge of the cube has a length of 1,what is the surface area of the smaller fragment of the cube.那个smaller fragment 是什么？请回答详细点，谢谢", 'contentText': "A plane cuts through a cube in such a way that the plane passes through three of the cube's vertices ,no two of which lie on the same edge.If the edge of the cube has a length of 1,what is the surface area of the smaller fragment of the cube.那个smaller fragment 是什么？请回答详细点，谢谢", 'supplyRich': '

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