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man....everyones so good...ill say 88 max

noo... i get wat u mean but like do u follow wat i did?? so like if i was where i was up to...wat wud u do? haii...ill show u tmw.. lol i realised nearli everything i post up...u say some crap.. y sound so pro for lolz....grr...trials coming up..u betta not beat me... >.<

oh and also in q. 7 find volume enclosed within the circle (x - 1)² + y² = 1 about the y axis. this is what i did.. r = x R = 2 - x .: A = pi * (4 - 4x) .: dV = pi (4 - 4x) dy V = 2 pi * I {0 -> 1} +- 4 sqrt(1 - y²)dy ..since x = 1 +- sqrt(1...

help.. using slice fin the volume of the solid obtained by rotating the region {(x, y) : 0 <= x <=sqrt 6, 0 <= y <= 6x² - x⁴ about the y axis. =) thanks

6. A vessel is being filled at a variable rate and the volume of liquid in the vessal at any time t is given by V = A (1 - e^-kt) a) show that dV/dt = k(A - V).........done already b) if one quarter of the vessel is filled in 5 minutes, what fraction is filled in the next 5...

how about Q17. A stone is thrown so that it will hit a bird at the top of a pole. However, at the instant the stone is thrown, the bird flies away in a horizontal straight line at a speed of 10ms^-1. The stone reaches a height double that of the pole and, in its descent, touches...

how do u know wat to sub in??

help.. i cant do some questions in fitzpatrick 3u change of rates Ex 25 a) 23. A metal sphere is dissolving in acid. It remains spherical and the rate at which its volume decreases is proportional to its surface area. Show that the radius of the sphere decreases at a constant rate...

arghh y didnt i get that.. did pplz get: [ 2(3x-1)^5/2 + 2(3x-1)^3/2 ] / 135 + C b4 simplifying ie..

y does the parallel line cut thru OP at midpt?

ohhh... but i thort the point P has to be on the interval.. wait...the line l continues on rite?? ohh i get it..

u sure man?? theres like about 20 something in our class.. i dun fink we have that much... meyb onli like 40...

thats no longer in Ext I.... but still good for Ext II

wheres the other two answers?

wahhh!! wat skools this?

i heard that in the HSC if u answered like the first few qs with the + C then u dun need to later on...cos they supposingly assume u know that its + C.. is this true?

hey ryan... i just realised we heaps behind... like realli..we havent even done exp. and logs yet man..

yea i know wat u mean.. like i read the topic in the last holz b4... but yea..its really similar anyway so its good.. like the application of the formulas are the same... anyway its not hard to derive the formula..

we stil havent done inverse trig either nor binomials and stuff... the projectile motion thing shud b alrite cos u do it in phys alreadi.... mer..we r gonna die

u sure bout that...i feel that we're behind in 3u too u know?? mayb its just me and my insecurity lolz..... hows ur holz bin man??? din see u after the examz