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For the 2005 HSC Maths paper, Question 10 iv) I don't understand how they differentiated in the solutions. Can you please explain it to me? I tried using the product rule but it doesn't turn out to be the same answer. Thanks

Need help in these question? 1. P,A,B and C are four points in a plane such that the angles BPA and CPA are obtuse and on the opposite sides of PA. PA = 8cm BP=10cm, PC=12cm , AB=14cm and AC=18cm. Calculate the length of BC and the area of the triangle ABC. Answer- 20.06cm,122.5 m2 2.P,A,B,C...

Can someone please help me with this questions? 1. In how many ways can 6 people be arraged in a circle if only 2 particular people are always a) together b) separated ? 2. 6 P 2 ( 6 permuation 2) = 120 (answer is 3) 3. The number of arrangements of 2n +2 different objects taken n at a...

" Words" are to be made from the letters REASON. How many 4-letter words are possible a) if the word contains both letters RN b) if R is included but 0 is excluded can someone explain to me why the answers in a) is (4x3)4x3 and in b) 4(4x3x2) thanks

why is n-1 (choose) (k-1) = (n-1)(n-2)... (n-k+1)/ 1x2x3x4...x(k-1)

Can someone please help me with this question? In how many ways can 5 men and 5 women be arranged in a circle so that the men are separate? ( I can do this - can't do the next part) In how many ways can this be done if two particular women must not be next to a particular man ? thanks in advance

can someone please help me with this question ? The coefficients of x^4 and x^5 in the expansion of (3-x)^n are equal in magnitude but opposite in sign. Find the value of n. Thanks

can someone please tell me all the long and short term causes of the civil rights movements in Northern Ireland from 1968 to 1969. thankx

Hi How do u integrate cosx.sinx dx thanks

can someone please explain this question to me . i know how to do the first part, i just don't know how to do the hence section. 1. by expanding sin (A+B) show that sin3@ (theta) = 3sin@-4sin^3@. Hence or otherwise find the smallest value of x that satisfies the equation 12x^3- 9x+2=0...

can someone please explain how i can do this question ? I have the method but i don't understand it When a polynomial P(x) is divided by x^2-4 the remainder is 2x+3. What is the remainder when P(x) is divided by x-2. Thankx

help with this question Integration between x=4 and x=2 of 2x^3-x^2+5x+3/ x thankx

hi can someone pleasse help me with this question ? Find the indefinite integral of 3 ^2x-1 and 2Q) Find correct to 2 decimal places, the area enclosed by the curve y= log base 2 x, the x-axis and the lines x=1 and x=3 by using Simpson's rule with 3 function values. and 3 Q)find the...

hi can someone explain to me how to do this question ? a 3 digit number is to be made from the digits 2,3,4,5,6,7. In how many ways can an even number be made from these digits? How many number over 600 can be made ?

can some please help me with these questions ? 18. A picture frame has a border of 2cm at the top and bottom and 3cm at the sides. If the total area of the border is to be 100cm ^2, find the maximum area of the frame. 19. A 3m piece of wire is cut into two pieces and bent around to form a...

can someone please help me with these questions ? 15. A surfboard is in the shape of a rectangle and semicircle. The perimeter is to be 4m. Find the maximum area of the surfboard correct to 2 places. 16. A half-pipe is to be made from a rectangular piece of meta; of length x cm. The...

hey ! can someone please help me with this question at point P(2ap,ap^2) on the parabola x^2=4ay a tangent is drawn to cut the axis of the parabola at T and the normal from P meets the axis in G. If S is the focus: b) if a line PN is drawn perpendicular to the zxis, meeting the axis in N...

need help with with question e ) i can do the rest but the questions are a follow up of each other a) Show that the point R(-1.5,-1) is external to the parabola x^2=4y. b) Find the equation of the chord of contact of the tangents from R. c) If this chord meets the parabola at P and Q, find the...

can someone please help me with this question ? Tangents are drawn to the parabola x^2= 16y from the points P (0,-4) and Q(2,-2) Show that the normals from the ends of these chords meet on the axis of parabola.

hey can anyone please tell me where I can find the census data / any data for conversion in the changing patterns of religious patterns from 1945- 2006? how do i give reasons for births and death to changes in religious adherence from 1945-2006?