How many terms of ap 24 21 18 is 78
Web16 mrt. 2024 · An important question from ML Aggarwal(Avichal Publication) Find the number of terms of the A.P; 24,21,18,... must be taken such that their sum is 78. Sir … WebHow many terms of the A.P. 24, 21, 18, … must be taken so that the sum is 78? Explain the double answer. Advertisement Remove all ads Solution A.P. is 24, 21, 18,... Sum = …
How many terms of ap 24 21 18 is 78
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Web19 apr. 2024 · So, the sum of the first 20 terms of the AP is 250. Example:How many terms of the AP: 24, 21, 18 … must be taken so that their sum is 78? Solution:Here, a = 24, d = 21 – 24 = –3, Sn= 78. We need to find n. We know that Sn= n/2[2a + (n – 1) d] Therefore, 78 = n/2[2 × 24 + (n – 1) × (-3)] 78 × 2 = n [48 – 3n + 3] 156 = 51n – 3n2 3n2– … WebLet's check sum of 4 terms ⇒ a 4 = a 3 + d ⇒ a 4 = 18 + (-3) = 15 ∴ S 4 = 24 + 21 + 18 + 15 = 78. By formula, a n = a + (n - 1)d ⇒ a 5 = 24 + (5 - 1) (-3) ⇒ a 5 = 24 + 4 (-3) ⇒ a 5 = …
Web4 jan. 2024 · Given : AP = 24,21.. Sn = 78 . To find : n = ? AP = 24, 21 , 18 .. So, First term of AP = (a) = 24, common difference (d) = (21 - 24) = -3. Let n no. of terms to be taken, So that sum = 78. So, sum of n terms of the AP, Sn = n/2 × [2a + (n-1)d] Substituting the given value in above formula we get, = n/2 × (2 x 24 + (n-1) × (-3) ∴ n/2 × ... Web29 jan. 2024 · Best answer Here, a = 24, d = 21 – 24 = –3, Sn = 78. We need to find n. Both values of n are admissible. So, the number of terms is either 4 or 13. ← Prev Question Next Question → Find MCQs & Mock Test JEE Main 2024 Test Series NEET Test Series Class 12 Chapterwise MCQ Test Class 11 Chapterwise Practice Test Class 10 Chapterwise …
WebAfter several unsuccessful predictions in 1994 and 1995, Camping predicted that the rapture and devastating earthquakes would occur on 21 May 2011, with God taking approximately 3% of the world's population into Heaven, … Web4 jan. 2024 · Given : AP = 24,21.. Sn = 78 . To find : n = ? AP = 24, 21 , 18 .. So, First term of AP = (a) = 24, common difference (d) = (21 - 24) = -3. Let n no. of terms to be taken, …
Webfind a and b in the ap 24 a+b 12
Web25 nov. 2024 · How many terms of the AP: 24,21,18 must be taken so that thier sum is 78? See answer Advertisement Brainly User First term, a = 24 common difference, d = 21-24 = -3 let the number of terms to get sum 78 is n. porth nanven cornwall felsenWeb11 apr. 2024 · Complete step-by-step answer: The given A.P is 24, 21, 18,................... So the first term (a) of the A.P is = 24. And the common difference (d) of the A.P is ⇒ d = ( … porth nanven cottageWebExample 2: Consider the following AP: 24, 21, 18, … How many terms of this AP must be considered so that their sum is 78? Solution: Let the number of terms that give the sum … porth near newquayWebExample: Find the sum of the first 20 terms of the arithmetic series if a 1 = 5 and a 20 = 62. Solution: Here, a 1 = 5 and a 20 = 62 and n = 20. If we have given the first term and the … porth navas oystersWebHow many terms of the A.P: 24, 21, 18, ……… must be taken so that their sum is 78? Advertisement Remove all ads Solution Let the number of terms taken be n. THe given A.P is 24, 21, 18, ..... Here a = 24 and d = 21 - 24= -3 S = n 2 [ 2 a + ( n - 1) d] ⇒ 78 = n 2 [ 2 × 24 + ( n - 1) × ( - 3)] ⇒ 78 = n 2 [ 48 - 3 n + 3] => 156 = n [51 - 3n] porth nefynWeb28 mrt. 2024 · Ex 5.3, 18 Important . Ex 5.3, 19 ... Ex 5.3, 4 - Chapter 5 Class 10 Arithmetic Progressions (Term 2) Last updated at March 28, 2024 by Teachoo. This video is only available for Teachoo black users Subscribe Now Get live Maths 1-on-1 Classs - Class 6 to 12. Book 30 minute class for ₹ 499 ₹ 299. porth neigwl mapWebSo, the sum of the first 20 terms of the AP is 250. Example: How many terms of the AP: 24, 21, 18 ... must be taken so that their sum is 78? Solution: Here, a = 24, d = 21 24 = 3, S n = 78. We need to find n. We know that S n = n/2 [2a + (n 1) d] Therefore, 78 = n/2 [2 24 + (n 1) (-3)] 78 2 = n [48 3n + 3] 156 = 51n 3n 2 porth nanven cornwall