Find the length of a vector + b vector and a vector minus b vector a vector equal to 4 Y - 3 J + K and b vector equals to minus i + J + 4K
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Explanation:
a = 4i -3j +k
b = i + j + 4k
a+b = 4i -2j +5k
a-b = 3i-4j-3k
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