**Sec. 2.1**
#2a,b) Plots--Hopefully will be posted soon.
#6b.i) v= (-1,2), so ans = 1/(sqrt(5))*(-1,2)
**Sec. 2.2**
#1a) u dot v = 2sqrt(3) => theta = pi/6.
#1d) u dot v = 2sqrt(2) => theta = 0.752 radians.
**Sec. 2.2**
#14a) The plane consists of all points (x,y,z) which satisfy
(x,y,z) = s*u + t*v + (1,0,1).
#14b) The dot product n and u is zero as well as the dot product
between n and v.
**Sect. 2.3**
#5a) s*u + t*v + P = s*(1,2,1) t*(3,-3,-1) + (1,0,1)
#5b) s(P-Q) + t(R-Q) + Q = s(3,-2,1) + t(3,-3,-1) + (-2,3,1).

Last modified: Fri Oct 25 15:33:39 1996