The sum of first nn terms of an AP is given by Sn=4n2+nSn=4n2+n. Find that APAP. AcademicMathematicsNCERTClass 10Given: Sn=4n2+nSn=4n2+n To do: We have to find the AP. Solution: Let us take sum upto 1 term S1=4(1)2+(1)=4+1=5S1=4(1...
)? What is the sum of first two terms? What is the second term? Similarly find the 3rd, the10th and the nth terms. 相关知识点: 试题来源: 解析 Solution: Given that,Sn = 4n - n2First term, a = S1 = 4(1) -(1)2=4-1= 3Sum of first two terms = S2= 4(2) -(2)2...
Hint:We can see that the given series in the problem follows an Arithmetic Progression (AP). We find the ${{n}^{th}}$ term of the series by using the first term and common difference of the given series. Once, we find the ${{n}^{th}}$ terms, we...
百度试题 结果1 题目If the sum of first n terms of an AP is An+Bn^2 where A and B are constants, the common difference of AP will be ( ) A. A+B B. A − B C. 2A D. 2B 相关知识点: 试题来源: 解析 D
【题目】T he sum of the third and the seventh termsof an AP is 6 and their product is 8. Find the sum of first sixteen terms of the AP. 相关知识点: 试题来源: 解析 【解析】Solution: From the given statements, we canwrite,Anda3×a7=8 ...()By the nth term formula,an=a+(n-1...
1. What does it mean to find the sum of the first n terms? Finding the sum of the first n terms is a mathematical process where you add up the values of the first n terms in a given sequence. This technique is commonly used in mathematics and statistics to calculate the total value...
The first term of an AP is 3, the last term is 83 and the sum of all its terms is 903. Find the numbers of terms and the common difference of the AP. 相关知识点: 试题来源: 解析 Now, a = 3l = 83S_n = 903We know,S_n=n/2[a+l]⇒ n/2[a+l]=903⇒ n/2[3+...
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In an Arithmetic Progression, the 9th term is 2 times the 4th term and the 12th term is 78. What is the sum of the first twenty terms? Arithmetic Progression: Arithmetic progression consists of a sequence of numbers equally spac...