WebIf the sum of first m terms of an AP is n and the sum of first n terms is m , then show that sum of first (m+n) term is - (m+n). Solution Let a be the first term and d be c.d. of the A P .Then Sm=n n= m/2 {2a+ (m-1)d} 2n= 2am+ m ( m-1)d. ........ (1) and Sn= m m= n/2 {2a+ (n-1)d} 2m= 2an+ n (n-1)d. ........... (2) Subtracting eq. (2)- (1), we get WebConsider an arithmetic progression (AP) whose first term is a 1 (or) a and the common difference is d.. The sum of first n terms of an arithmetic progression when the n th term is NOT known is S n = (n/2) [2a + (n - 1) d]; The sum of first n terms of an arithmetic progression when the n th term(a n) is known is S n = n/2[a 1 + a n]; Example: Mr. Kevin …
Arithmetic Series Worksheet / Quiz & Worksheet - Sum of the First …
Web(iv) Find its perimeter. [Ans. (ii) A'(-6,-4) and B'(0,-4), (iii) A parallelogram, (IV) 32 units. 10.(a) serie [Ans. 21) Write down the 10th term of the AP 3, 5, 7, 9.... ries arithmetic. It So, find its The nth term of the series is 2n - 1. Is the [Ans. Yes, 13] … WebJan 8, 2024 · In an AP the sum of first n terms is 3n2/2 + 5n/2 find the 25th term. 9,479 views. Jan 7, 2024. 253 Dislike Share Save. Math Army. 81.9K subscribers. In an AP the sum of first n terms is … t s u tornadoes please heart don\u0027t break
In an AP the sum of first n terms is 3n2/2 + 5n/2 find the …
WebMar 31, 2024 · Given: Sum of the first n-terms is 5n²/2 + 3n/2. To find: The 17th term of the A. P. Solution: Step 1. We find the sum of the first 17 terms. Sum of the first 17 terms is = 5 (17)²/2 + 3 (17)/2 = 5 (289)/2 + 51/2 = 1445/2 + 51/2 = 1496/2 = 748. Step 2. We find the sum of the first 16 terms. Sum of the first 16 terms is = 5 (16)²/2 + 3 (16)/2 ... WebThe sum of the first n terms of an AP is (5n 2 /2 +3n/2). Find its nth term and the 20th term of this AP. arithmetic progression class-10 1 Answer +2 votes answered Sep 14, 2024 by … WebMar 29, 2024 · Misc 3 Let the sum of n, 2n, 3n terms of an A.P. be S1, S2 and S3, respectively . Show that S3 = 3 (S2– S1) We know that Sum of n terms = n/2 [2a + (n – 1)d] i.e. Sn = n/2 [2a + (n – 1)d] where a is the first term & d is the common difference of the A.P. tsu tigers homecoming