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What is the value of k if the mid-point of the line joining (1 -...

Mathematics
JAMB 2007
What is the value of k if the mid-point of the line joining (1 - k, - 4) and (2, k + 1) is (-k , k)?
  • A. -3
  • B. -1
  • C. -4
  • D. -2
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Correct Answer: Option A
Explanation
(1-k+2) / 2 = - k and -4 + k + 1 = k
3-k = -2k and -3 + k = 2k
K = -3 and k = -3

There is an explanation video available below.

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Explanation Video

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