1) If A = ai + bj + ck Then |A| = ? a) √(12 + 22 + 32) b) √( b2 + c2) c) √(a2 + b2 + c2) 2) A = 3i + 4j - 5k then |A| =? a) 5√2 b) √50 c) 2√5 3) Suppose that a = 3i − j + 2k. Find the magnitude of the vector a) √8 b) √14 c) √4 4) If a = 2i + j, b = i − 4j + k, and c = j + k. Find the magnitude of the vector 2a − b + c a) √28 b) √58 c) √38 5) choose the correct statement. a) i × i = j × j = k × k = 1 b) i . i = j . j = k . k = 1 c) i . i = j . j = k . k = 0 6) Which of the following statements is false? a) Cross product is commutative b) Dot product of two vectors gives a scalar c) Dot product is commutative 7) Find the dot product (a . b) of the two given vectors: a = 2i + 3j + 4k, b = 3i + 5j. a) 10 b) 15 c) 25

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