how do i tackle these :
1A)
Consider the following position vectors, v=i-j and w=j-2k
find i) the angle between the above vectors
ii) a vector which perpendicular on both vectors
b) Let z=2-3j and s=1+2j find
2+z
Z^2-Z and 1+s
c) solve the following equation:
z^3 - z^2 +z = 0
amanda xx
Just as well, I goofed in the denominator when I posted anyway.
Okay, so the first one is
The second one is now ?
Because this is so simple up to here I presume you need help simplifying it. , so we have a radical in the denominator that we wish to get rid of. Now, recall the identity:
Thus if we have we can multiply it by to get rid of the radical. But what we do to the denominator we must do to the numerator...
<-- Now cancel the common factor of 2
-Dan