calculus problem is u = 7i +9j + 2 k and v = -7i -9j - 2 k. and my ans is -135 how to double check
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Why do you write asu for the subject? Are you going to Arizona State U?
The DOT product of those two vectors, u*v, would be +28, a scalar. The CROSS product u x v would be a vector. You have not said what the question is. You have only defined two vectors.
I get -134 for the dot product.
Damon is correct. I missed a dangling - sign in front of a 9 in the v vector.
my name is sohaib
To double-check the answer, we need to find the dot product of vectors u and v and verify if it equals -135.
The dot product of two vectors can be calculated by multiplying their corresponding components and then summing the results.
Given:
u = 7i + 9j + 2k
v = -7i - 9j - 2k
To find the dot product (u · v), we multiply the corresponding components:
u · v = (7 * -7) + (9 * -9) + (2 * -2)
= -49 - 81 - 4
= -134
Upon calculation, we obtain -134. However, since your answer is -135, there seems to be a difference. It's possible that there was an error in the calculation or in the given vectors. Please recheck the problem and perform the calculation again to ensure accuracy.