【题目 】In a certain sequence,each term after the secon d is the product of the two preceding terms. For example,the thir d term is the produc t of the first an d the secon d terms, the fourth term is the product of the secon d an d thir d te rms,an d so on.If the ...
Every term after the first two terms is the sum of the two terms that preced it, This sequence begins 0.1, 0.1, 0.2(=0.1+0.1), 0.3(=0.1+0.2), The next term is 0.2+0.3=0.5. 在一个特定的序列中,前两项之后的每一项都是前两项的和.如果这个序列开始为0.1,0.1,0.2,0.3,那么下一项是( ...
If the terms of a sequence are t1, t2, t3, . . . , tn, what is the value of n ? (1) The sum of the n terms is 3,124. (2) The average (arithmetic mean) of the n terms is 4. 选项: A、Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. ...
In a certain sequence,each term after the second is the product of the two preceding terms.For example,the third term is the product of the first and the second terms,the fourth term is the product of the second and third terms,and so on.If the seventh term is 1024 and the sixth ter...
Gmat数学,求简便算法~~For every integer k from 1 to 10, inclusive, the kth term of a certain sequence is given by . If T is the sum of the first 10 terms in the sequence, then T is(A) greater than 2(B) between 1 and 2(C) between 1/2 and 1(D)
A certain arithmetic sequence has 10 terms. The sum of the first and last term is 50. What is the sum of all the terms? A. 250 B. 275 C. 300 D. 325 相关知识点: 试题来源: 解析 B。解析:根据等差数列性质,若有 n 项,则 Sn = n(a1+an)/2。已知 n = 10,a1+an = 50,所以 ...
百度试题 结果1 题目The first four terms of an arithmetic sequence are , , , and . What is the th term of this sequence?( ) A: B: C: D: E: 相关知识点: 试题来源: 解析 A N/A. 反馈 收藏
❗He must store a large quantity of grain _41_ consuming all his grain immediately [A] other than [B] as well as [C] instead of [D] more than ❗Benefits have been weighed _20 _harmful outcomes. And generalizations have proved difficult. ...
Gmat数学,求简便算法~~For every integer k from 1 to 10, inclusive, the kth term of a certain sequence is given by . If T is the sum of the first 10 terms in the sequence, then T is(A) greater than 2(B) between 1 and 2(C) between 1/2 and 1(D)
【GMAT DS-PREP:第61-80题模考】GMAT考满分为GMAT考生提供GMAT DS-PREP:第61-80题模考练习。If the terms of a sequence are$$t_1, t_2, t_3, . . . , t_n$$, what is the value of n ? (1)