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Lapatulllka [165]
2 years ago
12

Let [v1,v2,v3] be a set of nonzero vectors in r^m such that the (transpose of vi)*vj = 0 when i is not equal to j. show that the

set is linearly independent.
Mathematics
1 answer:
babunello [35]2 years ago
6 0
Let \mathbf V be the m\times3 matrix whose columns are \mathbf v_1,\mathbf v_2,\mathbf v_3, and let \mathbf c be the vector whose components are the constants c_1,c_2,c_3. Now consider the matrix equation

\mathbf V\mathbf c=\mathbf 0


Multiplying both sides by \mathbf V^\top, we have

\mathbf V^\top(\mathbf V\mathbf c)=(\mathbf V^\top\mathbf V)\mathbf c=\mathbf 0

More explicitly, we're writing

\mathbf V=\begin{bmatrix}\mathbf v_1&\mathbf v_2&\mathbf v_3\end{bmatrix}

Multiply both sides by \mathbf V^\top and the left hand side can be written as

\mathbf V^\top\mathbf V=\begin{bmatrix}{\mathbf v_1}^\top\\{\mathbf v_2}^\top\\{\mathbf v_3}^\top\end{bmatrix}\begin{bmatrix}\mathbf v_1&\mathbf v_2&\mathbf v_3\end{bmatrix}=\begin{bmatrix}{\mathbf v_1}^\top\mathbf v_1&{\mathbf v_1}^\top\mathbf v_2&{\mathbf v_1}^\top\mathbf v_3\\{\mathbf v_2}^\top\mathbf v_1&{\mathbf v_2}^\top\mathbf v_2&{\mathbf v_2}^\top\mathbf v_3\\{\mathbf v_3}^\top\mathbf v_1&{\mathbf v_3}^\top\mathbf v_2&{\mathbf v_3}^\top\mathbf v_3\end{bmatrix}

We're told that {\mathbf v_i}^\top\mathbf v_j=0 whenever i\neq j, so we're left with

\mathbf V^\top\mathbf V=\begin{bmatrix}\|\mathbf v_1\|^2&0&0\\0&\|\mathbf v_2\|^2&0\\0&0&\|\mathbf v_3\|^2\end{bmatrix}

Each of \mathbf v_1,\mathbf v_2,\mathbf v_3 are nonzero, which means their norms are nonzero, which necessarily implies that \mathbf c=0, and so the vectors \mathbf v_1,\mathbf v_2,\mathbf v_3 must necessarily be linearly independent.
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Answer:

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Step-by-step explanation:

Let us suppose that,

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The information provided is:

P (R) = 0.27

P (D) = 0.56

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P (X|R) = 0.34

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Compute the probability that a randomly selected member favors some type of corporate tax reform as follows:

P(X)=P(X|R)P(R)+P(X|D)P(D)+P(X|I)P(I)\\= (0.34\times0.27)+(0.41\times0.56)+(0.25\times0.17)\\=0.3639

The probability that a randomly selected member favors some type of corporate tax reform is P (X) = 0.3639.

Compute the probability Democrat is selected given that this member favors some type of corporate tax reform as follows:

P(D|X)=\frac{P(X|D)P(D)}{P(X)} =\frac{0.41\times0.56}{0.3639}=0.6309

Thus, the probability Democrat is selected given that this member favors some type of corporate tax reform is 0.6309.

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Step-by-step explanation:

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Step-by-step explanation:

Let Xb be the no of braclets made

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