How many terms of ap 24 21 18 is 78
WebHow many terms of the AP 18 16, 14, 12, …. are needed to give the sum 78? Explain the double answer. asked Jul 26, 2024 in Arithmetic Progression by Haifa ( 52.3k points) 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 = …
How many terms of ap 24 21 18 is 78
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Web14 mei 2024 · How many terms of the AP : 24, 21, 18, . . . must be taken so that their sum is 78? Q.38. How many terms of the AP : 9, 17, 25, . . . must be taken to give a sum of … WebEasy Solution Verified by Toppr Given, a=−6 d=− 211−(−6)= 21 Formula, S n= 2n[2a+(n−1)d] −25= 2n[2(−6)+(n−1) 21] −50=n[ 2−24+n−1] n 2−25n+100=0 (n−20)(n−5)=0 ∴n=5,20 Therefore the number of terms required is 5 or 20 Solve any question of Arithmetic Progression with:- Patterns of problems > Was this answer helpful? 0 0 Similar questions
WebWhen $$n=4,{s}_{4}=\dfrac{4}{2}\left[2\times 24+\left(4-1\right)\left(-3\right)\right]=2\left[48-9\right]=2\times 39=78$$ Web10 jul. 2024 · Click here 👆 to get an answer to your question ️ Howmanydermsmustofthe AP: 24, 21, 18....must be taken so that their sum is 78? shafiya15 shafiya15 10.07.2024 Math Secondary School answered How many derms must of the AP: 24, 21, 18.... must be taken so that their sum is 78? 1
Web12 mrt. 2024 · How many terms of the AP : 24, 21, 18, . . . must be taken so that their sum is 78? Answers / Hints 1. a) 2. c) 3. d = 2ab, 590, 4. 2,6,10,14 / 14,10,6,2 OR 40 1. - 4 2. … 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 …
WebHow 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]
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, … dai bog unicorndai burchell ageWeb19 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– … dai best specializationWebConsider the following AP24 21 18How many terms of this AP must be taken so that their sum is 78 [4 MARKS] Formula 1 MarkConcept 1 MarkApplication 2 ... Consider the … dai burchell racing postWeb8 jan. 2024 · here,a = 24d = -3an = -78an = a + (n - 1)d -78 = 24 + (n - 1)-3 -78 = 24 -3n + 3 3n = 24 + 3 + 78 3n = 105 n = 105/3 n = 35so, -78 is 35th term of AP dai burchell racingWebConsider the following AP: 24, 21, 18..... How many terms of this AP must be taken so that their sum is 78? [4 MARKS] Solution Formula: 1 Mark Concept: 1 Mark Application: 2 … dai borboni torinoWebHow 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 = … dai cao