Given the vectors v = -2i + 5j and w = 3i + 4j, determine
1/2 V
w-v
length of w
the unit vector for v
v = -2i + 5j
w = 3i + 4j
(1/2)v = -i + (5/2)j
w - v = 5i - j
w = √(3i + 4j)^2 = 5
v_hat = (-2i + 5j) / √(2^2 + 5^2) = -.371i + .928j
Not too confident about the last one.
These are very basic algebra lessons.
You should learn to do it yourself, this looks like homework. What will you do in the exam? Take a phone browser to put the exam questions on Yahoo Answers?
Comments
v = -2i + 5j
w = 3i + 4j
(1/2)v = -i + (5/2)j
w - v = 5i - j
w = √(3i + 4j)^2 = 5
v_hat = (-2i + 5j) / √(2^2 + 5^2) = -.371i + .928j
Not too confident about the last one.
These are very basic algebra lessons.
You should learn to do it yourself, this looks like homework. What will you do in the exam? Take a phone browser to put the exam questions on Yahoo Answers?