Here are my answers can anyone give any feedback?
1. Simplifying an equation - 5
b) graph functions, f(x-1) moved one to the right
f(-x) reflected in the y axis
2. x=20 y=45 z=30
3a)i) gradient of AB = 2
ii) equation of line perpendic to AB going through (-1,1)
2y=-x-1
b) differentiating y=4x^3 - x^-1/3
i got - 12x^2 + 1/3x^-4/3
4. curve and line meeting at points C and D
i) find co ordinates - C (2,-1) D (4,3)
ii) exact length - sq root of 20/ 2root 5
5a) factor theorem ii) factories fully - (2x-1)(x+2)(x+1)
iii)solve equation so x=1/2, x=-2, x=-1
b) triangle q
6root 3 + 4
6. horrible question about the road race
couldn't do i)
ii) 17/2
7a)i) dy/dx of x^4 + 32x
4x^3 + 32
ii) find x co ord of turning point and its nature
x= -2, minimum
b) cost
t > cube root of 6 ( i know thats wrong)
8. curves that didn't meet
i got the discriminant to be m^2 + 8m + 8<0 and instead of using the quad formula i did m^2 + 8m < - 8
and ended up with like -8<m<-16 or something stupid
anyone get any of the same answers?