The Way

Wednesday, August 19, 2009

(x-11)/((x^2)-x-2) > 4
=> (x-11-(4x^2)+4x+8) / ((x^2)-x-2) > 0
=> ((-4x^2)+5x-3) / (x-2)(x+1) >0
since the numerator is always negative, denominator must be always negative too o.o
that means the solution set is.........................*checking answer key*...........................
...............(-1,2) !!!!

im so proud of myself for checking the answers before attempting the qn.

if one peanut costs 3 cents, and a kacang costs 4 cents, how much do you expect to pay for a bag with of peanuts+kacangs which weighs exactly 100 grams, given that the probability of a peanut being dropped into a bag is 0.45 and the probability of a kacang being dropped into the same bag is 0.37, and that the probability that a peanut weighs less than 2 grams is 0.3 and the probability of the kacang weighing less than 3 grams is 0.6 ( the assumption is that peanuts and kacangs are dropped at random in a factory and a bag is passed under the dropping thingys)?

if that question came out for the Alvl math exam, i will eat my paper.

Husaini @ 6:38 AM

about

Ahmad Husaini
02/05/1992
Raffles Rugby 05-08, Pwnage09, 10S06F
I like sports, though nothing in particular

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