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Find the derivatives of the function y = 2x\(^2\)(2x - 1) at the point x...

Mathematics
JAMB 2004

Find the derivatives of the function y = 2x\(^2\)(2x - 1) at the point x = -1?

  • A. 18
  • B. 16
  • C. -4
  • D. -6
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Correct Answer: Option B
Explanation

y = 2x\(^2\)(2x - 1)

expand the bracket

y = 4x\(^3\) - 2x\(^2\)


dy/dx = 12x\(^2\) - 4x
at x = -1
dy/dx = 12(-1)\(^2\) - 4(-1)
= 12 + 4
= 16


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WAEC offline past questions - with all answers and explanations in one app - Download for free
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
WAEC May/June 2024 - Practice for Objective & Theory - From 1988 till date, download app now - 99995
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709