Question

check my answers?

Answer 1

1) Find the dot product, a • b.

a = 6i + 5j, b = -5i + 4j
I got 50

Answer 2

2)Determine whether the vectors u and v are parallel, orthogonal, or neither.

u = <7, 2>, v = <21, 6>

I got Orthogonal

Answer 3

3) Find the first six terms of the sequence.
I got -3, -6, -12, -24, -48, -96

Answer 4

4)Determine whether the sequence converges or diverges. If it converges, give the limit.

11, 22, 44, 88, ...

I got Converges ; 165