JAMB Mathematics 2007 Objective — Question 18

Question 18 of 50 from the Joint Admissions and Matriculation Board (JAMB) Mathematics 2007 Objective paper, with the correct answer and a full explanation.

Find the nth term of the sequence 3/2, 3, 7, 16, 35, 74, ...

A. n.2^n
B. 3.2^(n-2)
C. 5.2^(n-3)-n
D. 5.2^(n-2)-nCorrect

Explanation

Checking the formula Tn=5(2^(n-2))-n against n=1,2,3 confirms it generates 3/2, 3, 7 - matching the sequence.

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