ahhh crap so it isnt a good idea to use it....
i need to change my ort my original one from trials was another robert frost poem and i was told not to do 2 poems esp by the same author
3u 66/84 79% - expecting way better since test was easy and lost alot of early marks due to stupidity
4u 51/120 43% - did ok, again lost stupid marks was aiming for 50%
9.
a) Show that if y=mx+k is a tangent to the hyperbola x^2/a^2 - y^2/b^2 =1, then m^2.a^2 - b^2 = k^2
if y = mx+k touches the hyperbola at point p(asecθ, btanθ), then:
m = b/asinθ
amsinθ = b
amsinθ - b = 0 (1)
also P must satisfy y=mx+k ie:
btanθ = amsecθ+k
amsecθ - btanθ = -k (2)...
can someone explain this and answer the questions below:
1. Brielfy explain why an exchange rate can move in the opposite direction the the TWI.
2. Explain the likely impact on the Aus's BOP of the decline in the TWI.
6.
a) Show that if y=mx+k is a tangent to the rectangular hyperbola xy=c^2, then k^2+4mc^2=0
b) Hence find the equations of the tangents from the point (-1, -3) to the rectangular hyperbola xy=4 and find the coordinates of their points of contact.
a) i can do, its just the discriminant...