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Can someone please help me with: 1) S (x^2+2)/(x^2+1) dx 2) S (x+1)/ (sqrt(4-x^2)) dx

need help on 4. Answer is: D but i got C.

a) x^3-9x^2+24x+k=0 has two equal roots. i) find the possible k values. I tried but i can't get a value for k.

What would the alignment of an 85% raw in Mathematics HSC exam be? And What would the alignment of an 65% raw in MX2 HSC exam be? What would be an E4 for MX1 in terms of raw marks? Thanks for your help :)

What marks would i need to aim for in order to get a UAI of 95+? My subjects are: MX2, Advanced English, Physics, Chemistry and SOR 1. Where should i aim for? Mid band 5s?

Prove this by mathematical induction. I tried n=1 but it does not satisfy it.

When are BOS changing the 4unit Syllabus? I keep hearing 2009 and 2010. Are they going to take out conics for Modellling of derivatives?

How do you integrate: x^2*e^-x^2? I tried to integrate it on a calculator but i got. 0.25*sqrt(pi)*erf(x)-0.5e^-x^2

When are your Prelim HSC exams? Mine are on Week 9-10.

...double integrals, triple integrals, surface integrals, contour integrals and volume integrals in engineering? Or does it depend on the engineering you do?

y=2sqrt(1-x^2) and y= sqrt(1-x^2) intersect at (1,0) and (-1,0). Find the volume of the enclosed when the region is rotated around: a) The x-axis b) The y-axis. I have done a) but i need help on b).

Find the area bounded by y=((x^2)/4) -2 and y=x+1. I have got the answer but i don't know whether it is correct. 100/3 is my answer. Could someone please verify this?

Integrate: (sinx.dx)/(1+cosx)

I haven't revised in ages so.. The expression kx^2-2x+k is negative for all values of x. Find the possible values of k. I was using the discriminant but then don't know what to do after that. Thanks for the help.

a) relationship between FORCE and ACCELERATION for the moon in circular motion. b) relationship between MASS and ACCELERATION for rocket lifting off to space. c) relationship between The PERIOD of orbit of a satellite and its ALTITUDE

What is a good way to remember Circle Geometry properties? I'm finding it very hard to memorise all the properties of the circle. Hence, that is the reason why i suck at geometry.

Does anyone know where to get prelim MX1 test papers from?

Hello, I need very difficult trigonometric function questions including proving and solving. Thanks .....How can i simplify identities like; cos6x and sin8x etc. really quickly. Could someone teach me the method. :)

1. If P(x,y) is any point on the line y=4x+3 show that the midpoint M of OP has the co-ordinates M(x/2,0.5(4x+3)). Hence find the locus of M ...i have done the 1st part i just don't know how to find the locus. 2. P(x,y) is a variable point on the line 2x-3y+6=0 and the pint Q divides OP in the...

P(2ap,ap^2) and Q(2aq,aq^2) are two points on the parabola x^2=4ay. The tangents TP and TQ drawn from an external point T cross the x-axis at A and B respectively. i) Find the co-ordinates of A and B. I know that A and B are A(x1,0) and B(x2,0) but i don't know what to do next.