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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
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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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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NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts