WebQuestion From - NCERT Maths Class 10 Chapter 5 SOLVED EXAMPLES Question – 13 ARITHMETIC PROGRESSIONS CBSE, RBSE, UP, MP, BIHAR BOARDQUESTION TEXT:-How many t... WebCLASS-10TH CBSE NCERT BOOK ARITHMETIC PROGRESSION EXAMPLE-13How many terms of the AP: 24, 21, 18, . . . must be taken so that their sum is 78?

How many terms of AP:27,24,21,..... should be taken so that their …

Web7 sep. 2024 · The term of the A.P. which is 0 is 10th. To answer this question, we need to follow the following steps: As we know the nth term of an AP that has a = first term, d = common difference and n = number of terms till the nth term is given by using the formula: Now, according to the question, We have an A.P. 27, 24, 21. where the first term or a = 27. WebSolution The correct option is B 19 Given that AP is 27, 24, 21 … a = 27; d = 24 - 27 = -3 Sn = n 2(2a+(n−1)d) Since the sum is 0 ⇒ n 2[2×27+(n−1)(−3)] =0 ⇒ n(54−3n+3) = 0 ⇒ … shark giant sawfish

How many terms of the A.P: 24, 21, 18……............ must be taken so ...

Web11 apr. 2024 · $ \Rightarrow d = \left( {21 - 24} \right) = \left( {18 - 21} \right) = - 3$ Now we have to find out the number of terms in the A.P if the sum of an A.P is 78. As we know that the sum (Sn) of an A.P is given as WebEasy Solution Verified by Toppr First term, a=18; common difference, d=16−18=−2 n th terms sum is given by S n= 2n(20+(n−1)d)=0 ⇒2a+(n−1)d=0 ⇒36−2(n−1)=0 ⇒36=2n−2 ⇒2n=32 ⇒n=19. or, n=16. Was this answer helpful? 0 0 Similar questions How many terms of AP:27,24,21,..... should be taken so that their sum is zero? What is the value of that … Web28 mrt. 2024 · We know that the sum of all terms of an A.P. is given by, S n = n 2 [ 2 a + ( n − 1) d], ……… (i) this can also be written as: S n = n 2 [ a + l], ………. (ii) here l = last term = a + (n-1)d. Here given that, a = 27 and S n = 0 We know that d = common difference = a 2 − a 1 = 24 − 27 = − 3. Putting these values in equation (i), we get shark gift ideas for women