Determine the third term of a geometrical progr... - JAMB Mathematics 2015 Question
Determine the third term of a geometrical progression whose first and second term are 2 and 14 respectively
A
1458
B
1485
C
1345
D
1258
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Correct Option: A
1st G.P. = a =2
2nd G.P. = ar − 1 = 54
2(r) = 54
r = 54/2 = 27
r = 27
3rd term = ar2 = (2) (27)2
2 × 27 × 27
= 1458
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