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Given that a = 5i + 4j and b = 3i + 7j, evaluate (3a...

Further Mathematics
WAEC 2017

Given that a = 5i + 4j and b = 3i + 7j, evaluate (3a - 8b).

  • A. 9i + 44j
  • B. -9i + 44j
  • C. -9i - 44j
  • D. 9i - 44j
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Correct Answer: Option C
Explanation

= \(3(5i+4j) - 8(3i+7j) = 15i + 12j - 24i -56j\)

= \(-9i - 44j\)


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JAMB CBT 2024 - Candidates, Schools, Centres, Resellers - Get Ready!
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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
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