WebIf in an A.P. the sum of m terms is equal to n and the sum of n terms is equal to m,then prove that the sum of (m-n) terms is -(m+n). WebCorrect option is A) S m=n= 2m[2a+(m−1)d] ⇒ m2n=2a+(m−1)d .................. (i) S n=m= 2n[2a+(n−1)d] ⇒ n2m=2a+(n−1)d ..................... (ii) Subtracting both equation ⇒2(mn− …
If ${S_m} = {S_n}$ for some A.P, then prove that ${S_{m + n}} = 0$.
WebThe sum of n terms of an AP can be found using one of the following formulas: S n = n/2 (2a+ (n−1)d) S n = n/2 (a 1 +a n) Here, a = a 1 = the first term, d = the common difference, … WebJul 25, 2024 · In an AP if Sm = n, Sn = m Prove that sum of (m+n) term is - (m + n) Class10 maths Izhar Sir APT ADDA 1.34K subscribers Subscribe 827 views 7 months ago … did japan have a civil war
Sum of N terms of an AP - Formula, Examples Sum of AP Formula - Cu…
WebWe have to find the AP. Put n = 1, S₁ = 1(4(1) + 1) = 4 + 1 = 5. Put n =2, S₂ = 2(4(2) + 1) = 2(8 + 1) = 2(9) = 18. The AP in terms of common difference is given by. a, a+d, a+2d, a+3d,....., a+(n-1)d. So, S₁ = a. First term, a = 5. S₂ = sum of first two terms of an AP = a+ a + d = 2a + d. To find the common difference d, 2a + d = 18. 2 ... WebIf in an AP the sum of m terms is equal to n end the sum of n terms is equal to m then prove that the sum of (m + n) terms is - (m+n) Solution First term = a , common difference = d … WebSolution Verified by Toppr Let a be the first term and d be the common difference of the given A.P. Then, S m=n 2m{2a+(m−1)d}=n 2am+m(m−1)d=2n ... (i) and, S n=m 2n{2a+(n−1)d} 2an+n(n−1)d=2m ... (ii) Subtracting equation (ii) from equation (i), we get 2a(m−n)+{m(m−1)−n(n−1)}d=2n−2m 2a(m−n)+{(m 2−n 2)−(m−n)}d=−2(m−n) did japan goverment switch to dem oracy