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### High School Mathematics - 25.8 Vectors - Review

 Q 1: Find the length of the vector 3i+6j-2kAnswer: Q 2: Find the magnitude of | 3i + 2 j +4 k| Answer: Q 3: Find the sum of 3i+4j+3k, 2i+6j+6k, 5i+3j+8k. Answer: Q 4: _____ vector is the identity element for vector addition.Answer: Q 5: Find the vector with initial point P(-4,2) and terminal point Q(0,-4).Answer: Q 6: Find the unit vector in the direction of P(1,2) towards Q(4,5)Answer: Q 7: Find the unit vector in the direction of P(1,2,3) towards Q(4,5,6).Answer: Q 8: Find a unit vector parallel to the sum of the vectors a = 2i+4j-5k and b = i+2j+3k.Answer: Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!

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