Sunday
December 8, 2013

# Posts by Grace

Total # Posts: 346

Precalc
Is it just ((6/11), (9/11), (2/11)) ?

Precalc
Yeah, sorry about that. There's a diagram to it and I wasn't sure how else to explain it.

Precalc
A line in space has the vector equation shown here. Fill in the blanks to find the position vector to the fixed point on the line that appears in the equation: vector r=(5+(6/11)d)vector i + (3+(9/11)d)vector j + (7+(2/11)d)vector k vector v= _____ vector i + _____ vector j + ...

Precalc
Ah. Alright, I think I understand.

Precalc
Thanks so much!

Precalc
I wish I could say that's why I don't understand this problem. But sadly, I still don't get it. Haha.

Precalc
In the problem before it says r(x)= (x^5 - c^5)/(x-c) Maybe it's referring to that? Does that help?

Precalc
By appropriate calculations, show that: lim r(x)=5c^4 (x->c)

Precalc
If α, β, and γ are direction angles for a vector in three dimensions and cos α = 0.6 and cos β = 0.7, find cos γ

Precalc
Suppose vector a is 3 units long, the magnitude of vector b is 1 units and cos (θ) = -0.3, where θ is the angle between the two vectors when they are placed tail-to-tail. What does the inner product of vector a and vector b equal?

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