JAMB Mathematics 2008 Objective — Question 20
Question 20 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2008 Objective paper, with the correct answer and a full explanation.
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The fifth term of an A.P is 24 and the eleven term is 96. Find the first term
- A. 12
- B. 4
- C. -12
- D. -24Correct
Explanation
T5=a+4d=24. T11=a+10d=96. Subtracting: 6d=72, d=12. a=24-4(12)=-24.
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