Recent content by ozidolroks

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

回复: binomial expansions how did u get 3n! on the numerator of the second last line ?

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

回复: Integration how do u integrate cos^3 x dx

回复: Integration and probability thanks can u please help me with this question 1. integration of sin^2x.cos^2x dx 2. simplify sin4xcos4x, sinxcosxcos2x, 2sin2xcos2x 3. In how many ways can 5 men and 5 women be arranged in a circles so that the men are separated? In how many was can...

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