In a geometric sequence, the first term is 2 and the common ratio is 3. What is the 4th term? A. 18 B. 54 C. 16 D. 32 相关知识点: 试题来源: 解析 B。等比数列通项公式为 an = a1×r^(n - 1) ,将 a1 = 2,r = 3,n = 4 代入,可得 a4 = 2×3^(4 - 1) = 54 。
试题来源: 解析 B。解析:在等比数列中,通项公式为an = a1 * q^(n - 1)。这里求第五项,n = 5,a1 = 2,q = 3,代入公式得a5 = 2 * 3^(5 - 1)= 2 * 3^4。A选项计算的是第四项,C选项计算错误,D选项也是计算错误。反馈 收藏
Answer to: In a geometric sequence, the first term is 8, and the sum of the first 6 terms is 74,648. Find the third term of the sequence. By...
In a geometric sequence, the fourth term is 18 and the seventh term is {eq}\frac{243}{32} {/eq}. Find the first and nth terms. Geometric Series: Suppose the first term of a geometric sequence is a, and the common ratio is r; we use the be...
Ifa:b=c:d, then prove that(a+c):(b+d)=√a2−c2:√b2−d2 View Solution यदिa,b,c,dगुणोत्तर श्रेढ़ी में है, तब(a+b)2,(b+c)2,(c+d)2होंगे ...
结果1 题目In a geometric sequence used to model compound interest, if the initial investment is $500 and the interest rate is 4% per year compounded annually, the amount of money after two years is ___. A. $540.8 B. $540 C. $530.4 D. $520 ...
结果1 题目 The first and second terms of a geometric sequence are n and an, in that order. What is the 1,000th term of the sequence? ( ) A. a^(999)n B. a^(1,000)n C. a^(1,001)n D. (an)^(999) E. (an)^(1,000) 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
an analysis on the st an ancient arena an ancient giant an ancient term for c an ancient urn-shaped an anthropologist on an anxious mind an anxious sound an apparition an apple a day keeps an apple ofdiscord an application of the an application to tra an approach to exploi an approach...
In Exercise, match the geometric sequence with its graph. [The graphs are labeled (A), (B), (C), and (D).] ()$a_{n}=18\left( -\dfrac{2}{3}\right)^{n-1}$ A. B. C. D. 答案 C 相关推荐 1In Exercise, match the geometric sequence with its graph. [The graphs are labe...
HUBERT-FERRARI A, KING G, MANIGHETTI I, et al., 2003. Long-term elasticity in the continental lithosphere; modelling the Aden Ridge propagation and the Anatolian extrusion process[J]. Geophysical Journal International, 153(1): 111-132. doi: 10.1046/j.1365-246X.2003.01872.x CrossRef Google...