1 year ago

So my grades keep going down Whats the best way to study

Mathematics

1 answer:

riadik2000 [5.3K]1 year ago

5 0

Answer:

Step-by-step explanation:

study

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Step-by-step explanation:

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3 years ago

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Maurinko [17]

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Step-by-step explanation:

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2 years ago

2. Vectors u and v are given by: u=5i-4j+ pk v=2i+tj-3k (a) Express p in terms of t when u and v are perpendicular.

Sindrei [870]

If u and v are perpendicular, then their dot product is zero:

$\vec u \cdot \vec v = (5\,\vec\imath-4\,\vec\jmath+p\,\vec k) \cdot (2\,\vec\imath+t\,\vec\jmath - 3\,\vec k) = 10 - 4t - 3p = 0$

Solve for p :

$10 - 4t - 3p = 0$

$3p = 10 - 4t$

$\boxed{p = \dfrac{10-4t}3}$

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2 years ago