In a given geometric sequence gn, g(4) = 5 and g(6) = 11.25. What is g(14)+g(17)?
题目
In a given geometric sequence gn, g(4) = 5 and g(6) = 11.25. What is g(14)+g(17)?
(A) 8/27
(B) 4/9
(C) 2/3
(D) 8/9
(E) 9/8
答案
it should be none of the above because g(6) > g(4) means that the sequence is growing bigger...g(14) and g(17) should be bigger than g(6) but all the answers are smaller than 1 except E but E is only 1.something...
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