7. If A = 3i - j - 4k, B = -2i + 4j - 3k, C = i + 2j - k, find (a) 2A - B + 3C, (b) |A + B + C|, (c) |3A - 2B + 4C| (d) a unit vector parallel to 3A - 2B + 4C , Scalars and Vectors problem no 7. Sindh Textbook Board (stb) problems

 7. If A = 3i - j - 4k, B = -2i + 4j - 3k, C = i + 2j - k, find (a) 2A - B + 3C, (b) |A + B + C|, (c) |3A - 2B + 4C| (d) a unit vector parallel to 3A - 2B + 4C