gee sorry i was just giving another way to do it which uses logic instead of just subbing into formulas
n u do 3 unit so u should appreciate my methods
y acceleration = -1.6
y speed = -1.6t + V, V = inital velocity
y displacement = -1.6/2 t^2 + Vt
max heigh occurs when y speed = 0
t = v/1.6
sub back in to displacement
20 = -1.6/2 * V^2/(1.6)^2 + V^2/16
then solve for V
V = root(40 * 1.6)
i doubt they will ask this, it is too...
the graph is of velocity so the distance is the area under the graph.
when you draw the graph in iii) a bit of the graph is under the x axis so i integrated in 2 parts and added them together.
for the first part i wrote out all the possible dice rolls and i got probability of getting sum 5/36???
1+4
2+3
3+2
4+1
wat the hell i dunno wat the hell i did but i counted 5
argh
anyone help me with this:
when the polynomial P(x) is divided by (x+1)(x-4), the quotient is Q(x) and the remainder is R(x).
i) Why is the most general form of R(x) given be R(x) = ax + b
ii) Given that P(4) = - 5, show that R(4) = -5
iii) Further, when P(x) is divided by (x+1), the...
4 b) ii)
for the probability i did a table of possible outcomes
1 1
1 3 *
1 5
1 7
2 1
2 3 *
2 5
2 7
3 1 *
3 3 *
3 5 *
3 7 *
6 * 1/3 * 1/ 4 = 1/2
wat did u get?