- #1
hagobarcos
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Homework Statement
Find the unit vector normal to the function f(x) = -3x^2 + 5 and the point (1,2)
and find a unit vector parallel, using f(x) and the point (1,2).
Homework Equations
How do I find the slope here? I attempted to just use the point (0,5), and then the given point (1,2),
resulting in a slope of -3/1 or -3.
And since a vector is sometimes a line between two points, used that to develop a form.
So vector parallel equals <1i, -3j>
The perpendicular would simply be pointing 90 degrees out.
So, after setting the dot product equal to zero, vector perp. equals <3,1>
Is this the right track?
The Attempt at a Solution
Then to find the unit vectors for the parallel bit and the perpendicular bit I divided by their magnitudes, sqrt(10).
Attached is a photo of what I did.