搜狗做题网这是一道GRE数学题,没明白,
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这是一道GRE数学题,没明白,
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
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
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
由题目中的条件可见该数列是5,7,11,19,35...故选A,C,E