Find $u + v$ , when $u = (3, 4, - 2)$ and $v = (0, - 4, 0)$ .

(3, - 8, - 2)

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(- 3, 0, 2)

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(3, 0, - 2)

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None of these

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Solution

The correct option is D $(3, 0, - 2)$
Given points
$u (3, 4, - 2)$ and $v (0, - 4, 0)$
$\to u = 3^i + 4^j - 2^k$
$\to v = - 4^j$
vector
$\to u + \to v = 3^i + 4^j - 2^k - 4^j$
$\to u + \to v = 3^i - 2^k = (3, 0, - 2)$

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