2016
Mathematics
67ca00ce0c643c71d77dee1f
If the 2nd term of a G.P is 8/9 and the 6th term is 4(1/2) . Find the common ratio.
A.
2
B.
3/2
C.
2/3
D.
3
Correct Answer: 3/2
Explanation
T26 = 4(1/2) ar = 8/9 ar5 = 9/2 ar/ar5 = 8/9 x 2/9 1/r4 = 16/81 r = 4√(18/16) = 3/2
T26 = 4(1/2) ar = 8/9 ar5 = 9/2 ar/ar5 = 8/9 x 2/9 1/r4 = 16/81 r = 4√(18/16) = 3/2THIS WEEK's
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