The vector is written as

MATHEMATICS · Single correct · A Level · Mathematics · Vectors · Vectors

Problem

The vector K\mathbf{K} is written as 7 ı^−9 ȷ^7\,\mathbf{î} - 9\,\mathbf{ĵ}. What is the coefficient of ȷ^\mathbf{ĵ}? (a) 99 (b) −7-7 (c) −9-9 (d) 77

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