Question

这是一道GRE数学题，没明白，求大神解答一下

In a certain sequence of numbers, each term after the first term is found by multiplying the preceding term by 2 and then subtracting 3 from the product. If the 4th term in the sequence is 19, which of the following numbers are in the sequence? Indicate all such numbers A.5 B.8 C.11 D.16 E.35

Answer 1

题意：在某个数列中，第一项之后的每一项是前一项乘以2再减去3。如果该数列的第四项是19，那么如下几个数中哪一个在这个数列中？选出所有合适的答案。A.5 B.8 C.11 D.16 E.35

由题目中的条件可见该数列是5, 7, 11, 19, 35...故选A, C, E

Answer 2

关于GRE题目的问题可以去新东方在线论坛求助哦，上面有很多考过的小伙伴