a b = {4, 2}, where a = {-4, 1/4}, b = {-1, 8}
Method:
Multiply the x-components together.
Multiply the y-components together.
Add them.
Specifically:
a · b = (ax × bx) + (ay × by)
Plug in your values:
= (-4 × -1) + (1/4 × 8)
= 4 + 2
= 6
Hint: Have you seen/learned the formula for the dot product?
If so, state it here .
If not, search a little. Google is your friend. Then state it here.
Then we will show you how to apply it.
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Answers & Comments
a b = {4, 2}, where a = {-4, 1/4}, b = {-1, 8}
Method:
Multiply the x-components together.
Multiply the y-components together.
Add them.
Specifically:
a · b = (ax × bx) + (ay × by)
Plug in your values:
= (-4 × -1) + (1/4 × 8)
= 4 + 2
= 6
Hint: Have you seen/learned the formula for the dot product?
If so, state it here .
If not, search a little. Google is your friend. Then state it here.
Then we will show you how to apply it.