Further MathematicsSequences and seriesWAEC
The 3rd term of an arithmetic progression is 11 and the 7th term is 27. Find the first term.
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Answer: A. 3
a + 6d − (a + 2d) = 16 gives d = 4; a = 11 − 2(4) = 3.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.